I'm decideing between the NAD C272, the B&K ST 125.2, and ATI AT 1202 amplifiers.
I haven't listened to any of them yet, but was if they are pretty even as far as sound quality goes, and what type of sound quality they produce. Any advice would be appreciated. I'm also not sure how much the B&K 125.2 costs, so it might be out of my price range of $1000. The B&K does have balanced XLR inputs, and I've heard those are better, but I'm not sure why.

The amp will be used to drive Polk RTi speakers at first, but should be selected for proper matching with Definitive Technology speakers, which will come shortly afterwards. Any advice on those three amps (or any other brand you might suggest) would be appreciated.

Thanks!