If you're looking for something within your budget, the consider the Nutrimill Artist. It can be bought at a modest price. And it performs very well!! I have one. It's in this pic next to my Globe stand mixer.
well it really depends on what type of baking you’re going to do. There’s two types of mixers planetary and spiral.
Planetary mixers have a fixed bowl and the mixer head rotates from above. This type of mixer is good for batters and cookie doughs. Planetary mixers are no good for heavy doughs like bread and pizza. Since the bowl is stationary the heavy dough gets wrapped around the dough hook and gets dragged around the bowl. This creates friction heat which will kill the yeast. It also does not knead the dough properly. Mixing a lot of heavy dough in a planetary mixer will strip out the gear. They are simply not designed for mixing a lot of bread dough.
Spiral mixers have a rotating bowl and mixer head. There’s also a center post so the dough moves around the mixer attachment and the center post as the bowl turns. This movement turns the dough in the bowl, reducing friction heat and better kneading the dough. A spiral mixer is ideal for heavy doughs like bread and pizza.
Spiral mixers are very expensive. But if you are going to bake a lot of bread and pizza, it is definitely a mixer you would want to consider.
Insofar as brands, for planetary mixers KitchenAid is the most popular brand. I own two different models of KitchenAid, one of which is 20 years old and still going strong.
Spiral mixer brands that mix both dough and batters are
Bosch Universal (has some plastic parts)
Häussler Alpha Mixer
The Famag Grilletta is a dough only.
The WonderMix is a multi task appliance that I wouldn’t recommend
edit: you can view all the spiral mixers on Pleasant Hill Grain Company’s website. Unfortunately American companies don’t make spiral mixers, at least not home machines. So all the spiral mixers are European imports with the exception of the WonderMix, which is not a good quality mixer compared to the Europeans home spiral mixers. So Pleasant Hill Grain is the only company that imports all the brands.