That doesn't leave much for wiring, converter and the sub.
If you really want the sub, then I'd say drop the Comp set for now. The stock door speakers sound fine even on aftermarket H/U power. I have mine on 50w RMS and they are getting me by fine, as long as you set them up with a good crossover on the H/U.
2001 Grand Prix GT Sedan Silver :: Sony CD-GT54UIW :: Clarion EQS746
2x Audioque SDC2.5 12" D4 + Audiopipe AP1500.1D :: 4 cu ft @ 32Hz, 1500w @ 1ohm
Crescendo CCX65 Doors :: Pioneer 6x9 Rear :: Cadence CRS-Z9 4ch