I'm think I've decided on Infinity Speakers to upgrade from the Blose. My question is, which should I go with, Infinity Kappa, Infinity Kappa Perfects, or Infinity References? I want clean Mids and Highs, I have a sub for my Lows and a Pioneer AVIC N2 for my headunit. I plan to add only speakers at first without an amp just running off the headunit, then put in the amp later when I'm ready to upgrade (probably a couple months afterwards) so I'm not dumping sooo much money into it at once. This is the amp I think I'm going with http://www.partsexpress.com/pe/showdetl.cf...tnumber=269-164 unless you have other inexpensive recommendations or something against this amp. Thanks in advance.