just buy French
and you will be happy.
Having tried out several brands (in Europe, that is) I might say you might want to stick to Robot-Coupe or their respective household brand Magimix.
I do know for sure that there had been some severe to-and-fro going on in the USA, businesswise. (Cuisinart and Robot-Coupe behaving like some queer Barbie dolls in the beginning, it must have been something about patent infringements and one not wanting to have to do with the other - just blah stuff).
Seen from here I cannot see any major technical difference between Robot-Coupe, Magimix, Cuisinart or the older KitchenAid processors. All seem to be made with a substantial induction motor and no speed control (just the choice between "run" and "run shortly" = pulse button).
That is what you will want: Full power and full speed with the best blades you can get.
Going down in the price range you might even get some Braun Multisystem (models K 850 to K 1000)- nowadays called Braun Multiquick 7 (up to models K 3000). They do not have a heavy induction motor but a DC brushed motor with some extra cooling fan and a speed control. Not really comparable to the ones above but within the household and thrift range I consider them best choice. Ours has been going strong for 2 years now without complaints, even in the semi-commercial usage. Very silent, very versatile and a real bargain at some 139,- to 220,- Euros with all attachments (dough bowl with kneader and whisk/ full processor/shredder kit and a full fledged glass jar blender) - (I do not know about the US or Canada prices though).