Stereo & Electronics - replacing entire monsoon system...

Ive already replaced the hu, and im thinking of removing all of the monsoon crap. remove/replace all the speakers and the amp. with the cars having 6 speakers, whats the best way to replace the amp? Is there a 6channel amp? or should i just replace the front and hatch speakers?

im also thinking of maybe putting two 10's in the passenger and driver side in the trunk.

ditch the harch speakers

put w/e subs you want in the hatch well, then components in front and coaxials in the rear off a 4 channel/ or even 2 channel and rears off the HU.

I have a 8" sub in the trunk, a new head unit that powers the door speakers(I kept the stockers) and the sail panels(a new pair of Clarions). I removed the crap(I mean speakers) out of the hatch.

Even without the sub in the trunk it sounds way better than the stock POS the car came with.