1. it all depends on your sound package, im not too sure what non-infinity speakers can handle, but i heard there are 3 more different power amplifiers that u can get....ayhab said:1 - do the mfgs not match the stereo with speakers that will handle their full power?
2 - what 6.5" speakers do I buy that WILL handle the system regardless of volume?
2. if you want to go quality sound, i'd go with infinity reference series, not that expensive, and produce better sound than some other speakers and wont blow. ofcourse you can go crazy and get RF's or Type R's....but in perfect world, any of the aftermarket speakers should have enough to stay above the amplification. (yes, even 20$ pair of Dual, thats what i have in my front doors for now )