which 6 x 9's?

Hi all, Newbie here with a quick question. I am at a quandry about which speakers to go with. I blew the Pioneer 6 x 9's out and am going with a better brand this time. I have been looking between Infinity Kappa 693.9I or Polk Momo MMC690 speakers. I am driving them with a Performance Teknique ICBM-775. The current speakers are in the door bottoms of my '72 Chevy pickup, completely Dynamatted interior regions of the doors as well as cab. I have baffles around them as well to keep out the "cooties". I have Pioneer 6 1/2's in front and am running no sub. The HU is a Sony Xplod Ipod-ready unit, don't know the model off hand, but it is the previous version (last years) to the CDX-GT930UI. It has 4-volt pre-outs which is what I have driving the amp. The old Pioneers could'nt handle the thump that I was throwing at it as I even had it trimmed way down via the gains. I want to step up to a better quality speaker. I like the Kappa's because they are 2-ohm for a little more punch and even have the external crossovers (which I handle through the Amp trimmers anyway) and I have read the reviews about the Momo's as well being a top-notch performer. Please help me to narrow it down. Thanx in advance for the help! Bud Weaver

both speakers are pretty good, the polks sound nice but ive never heard the infinity kappa 6x9s . get whatever sounds best to you, it's your system. personally i would ditch the back speakers and stick some 6 inch subwoofers back there and then get some good front speakers but thats just me

Thanx for the reply. I hear what you are saying about the subs but there is nowhere to put any. Still has the tank behind the seat and the seat bottoms are occupied with amps and CD changers as well as the motors for the seats themselves so I am relegated to the 6 x 9's in the doors. Thanx! Bud