I don't have much to say for the Infinity amps-positive or negative. They're not too popular however. We just don't see many of them and never really have any requests for them. But for $50 if it works, you can't go wrong (hell, you can't get a crappy "Boss, Pyramid, [insert other flea-market brand name here]" amp that cheap so I'd say you did well!

Be sure to post new #'s and feedback once it is installed however so that there is some reference here...

(For the record, I do however like the Infiniti components-there higher line stuff is really clear and stands up well to higher wattage systems).