Ok, here's what my budget and I have planned for my '05:

Leave tweeters in the dash
new HU with one pre-amp
6x9's- rated up to 40 RMS
6.5's- rated up to 35 RMS
260 Max watt, 4 channel, bridgeable amp (not sure how many RMS it puts out)
one 200 watt RMS 8" amplified Bazooka sub

So, aside from the usual wiring etc., is this doable? Will I be able to add the 8" sub to this setup? Thanks for the help.