Don't just buy some cheap mixer and hope for the best - the stuff from Aldi is often really useless for regular blending. For smoothies and soups you need a certain amount of power and stability, otherwise you're stuck with a device that feels like a toy. I went through that myself after my old immersion blender (about as old as yours) gave up the ghost - I got myself a cheap mixer because I thought saving money is saving money, and that was total crap.
A regular stand blender can actually serve you pretty well, but you need to know what to look for. You need at least 800-1000 watts, decent motor power basically. An immersion blender is just more practical for small amounts and especially with soups I can tell you it's more convenient - you hold it directly in the pot instead of pouring everything into a big container to put in the blender. If you only blend stuff occasionally then maybe a better immersion blender for 40-60 euros is enough, they hold up pretty decently these days. But if you make smoothies daily and blend soups regularly then I'd go for a mid-range price point - with an immersion blender something from Philips or Bosch (have always been reliable for me personally), or with a stand blender something with decent watts. Aldi mixers are just too underpowered for that kind of thing, trust me.