The Infinitys DO NOT compare to Pioneers... pioneer is total crap compared to Infinity.

Crutchfield does know their stuff, but they are wrong from time to time... in a 94 Accord, there is no worry of the speaker depth for the rear speakers... there is nothing in the way, so the rear does not matter. For the front, you may need to do some cutting to the plastic basket in the door... like will said... but its nothing too difficult.

I also wouldnt compare JL subs to Infinity... the Kappa Perfect sub is one incredible sub... it just needs a TON of power to sound good and for it to be reliable. A Kappa Perfect will BLOW AWAY a JL W3.

You may also want to look into Polk Audio components... they are a little more defined sounding than a comparable Infinity...

For an amp... I highly recomend Alpine...