Hrmmm. Keep rear speakers stock. Attenuate so they play very low...
My suggestion
Aura 5000RPM 5-1/4" 2-way Component Speaker Pair 269-180
And any amp choice from below to accomodate your build + future upgrade ideas...
http://www.parts-express.com/wizards...ra+rpm&x=0&y=0
FYI...the rpm2300 clamped makes over 700 clean watts bridged. Those aura amps are over built and nice.
Want subs?