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The Keychron K2 Pro is a solid choice, though I'd actually lean toward the Akko 3068B or similar if you can find it in that price range - better stabilizers out of the box, which matters way more than people think. The K2 Pro's typing feel is decent, sure, but the stab rattle is real on stock units, and swapping stabilizers adds hassle and cost. Both boards hit the hot-swap requirement, both are under $150, but the Akko tends to feel more polished without extra work.
That said, if you're already comfortable modding, the K2 Pro opens up more switch options since it's more popular - easier to find enthusiast reviews on specific switch combos. You're also getting a larger community for firmware tweaks if you want to reprogram layers. The trade-off is you're buying a board that *needs* some love to sing, whereas other options ship better calibrated.
Don't sleep on the Monsgeek M1W either if stock availability allows. 75% layout, hot-swap, comes in around $130 - 140, and the typing experience is legitimately competitive with boards double the price. Build quality feels more premium, stabilizers are acceptable without modding. Real talk: anything in this bracket under $150 involves some compromise - you're choosing between "needs tweaking but great potential" versus "ready to use but less customizable." Depends if you want a project or a keyboard that just works.
I picked up a Keychron K2 Pro a while back and it's been solid for the price - honestly surprised by how satisfying the typing feel is even with budget switches. The hot-swap sockets work great, swapped out the stock switches within minutes and didn't need any special tools. Build quality feels decent, though the plastic case is obviously not premium, but that's kind of expected at this price point.
For under $150 you've got some solid options. The Keychron K6 Pro is another one people rave about, smaller footprint if you prefer a compact layout. There's also the Anker Mechanical Keyboard 8009 floating around that folks seem happy with - gasket mount stabilizers and hot-swap for less money than you'd expect. Honestly the Monsgeek MG144 pops up in a lot of recommendations too if you want something with a bit more personality, though availability can be spotty.
The thing with this price range is you're trading off a bit on the case material and maybe some stabilizer refinement, but the hot-swap functionality itself is solid across these boards. Just make sure whatever you pick uses standard switch stems (most do now) so you have flexibility buying new switches down the line. Your switch choice will honestly matter more than the keyboard itself once you're in this bracket - lubed linears or clicky tactiles will feel way different from whatever stock switches come in the box.
Most boards under $150 have stabs that feel mushy out of the box, so factor in another $20-30 if you want to lube and tune them properly - that's where the real difference shows up. The Keychron K2 Pro and Akko models both do hot-swap well enough, but don't skip the stabilizer work or you'll end up disappointed even with premium switches installed.
Worth noting that wireless hot-swap boards are trickier to find in that budget - most of the solid options are wired, which matters if you're planning to move it around or use it in different spots. If you do go wireless and want to avoid regret, check the battery life specs carefully, since some budget models drain surprisingly fast. The stabilizer tuning point everyone mentioned is real, but I'd add that even just swapping in different stabilizers entirely (like some Durock or Everglide ones) sometimes costs less than lubing stock ones and gives you more noticeable improvement.
The budget sweet spot is actually a bit higher than $150 if you want to avoid cheap stabilizers ruining the experience - save up another $20 or so and you'll notice the difference immediately in how the spacebar feels. If you're set on staying under $150, just plan on spending an afternoon lubing and tuning whatever board you pick, because that's where most of the satisfaction comes from anyway.
If you're set on hot-swap under $150, don't sleep on the Keychron C1 Pro or similar compact boards from that lineup - they hit that sweet spot on price without feeling cheap. The thing that actually matters more than the board itself is whether you're willing to spend an extra $20-30 on stabilizer mods, because stock stabs on budget boards tend to rattle and feel plasticky no matter which one you grab. I swapped out the stabs on a budget board I had at home and it made a bigger difference than I expected, went from feeling kind of mushy to actually responsive.
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