What's your price range?
I'm a little unclear on your requirments. When you say "extruder/press," does that mean it needs to be an extruder? Or, can it be a roller/cutter?
By "stainless," how much other than the extruder plates and the rollers needs to be stainless? No plastic? Or no chrome over steel?
The Kitchen Aid pasta maker (roller) is very nice. Bosch makes an excellent extruder that works with the meat grinder of their big mixer. You can get a pasta extruder set for the Electrolux Assistent. And so on, and so forth.
In fact all the big deal home mixer manufactuerers sell attachments which roll or extrudes pasta one way or the other -- all of them pretty good or better -- none of the inexpensive. It seems to me that the first task is to choose the machine. You'll want to look at Bosch, Cuisinart, Electrolux, Kitchen Aid, Viking, and possibly Hamilton Beach.
If you're serious about pasta, but less so about a mixer, you might want to think about getting a dedicated pasta machine like an Atlas with its own motor.