I just got a Audison LRX2.150 for my CDT comps, and it sounds awesome, but its about a $100 over your budget. Got it from woofersect for 349 free shipping. Arc is really good too, almost got the KAR 400.2 amp, which is on sale at woofersect for 219 free shipping thats prob close to the best one in your budget range.
Don't let someone fool you into thinking you need some rare/uncommon amp for good sound.
Any quality amp will work, and for your price there are many.
IMO a quality amp is an amp that fits in the space you have to offer, gives you the adjustment options you want and the power you need for your price range.
Clarion makes some of the best budget amps money can buy, with great power output and loads of tuning options.
I've got a Coustic 510-DR, 100rms @4ohms x2 it sounds really good. your going to get a lot of different good sounding amps. I also have an MB Quart 4200, thats a 4ch. I would recommend both. Are you really located in mexico?