clean sweep with my new car

i am getting a new g37 and wait or altima coupe in a week, i wanted to retain the factory radio, bluetooth, and such

i heard the clean sweep is the best way to go, the  altima im leaning towards (cheaper than the g37), has a bose system with 7 speakers, and 2 subs pushed by a bose amp, how would i bypass the factory amp, also if anyone could tell me the factory speaker sizes so i can get aftermarkets, i already have an eclipse mids amp, mmats bass amp, an epic160 in dash bass meter, o gauge kit with 2 optima yellow tops, 2 5 1/4 mb quart component sets, 6 pioneer premier 6x9's and 4 mmats tweeters, and 2 pioneer premier 12 spl 3000 watts ( though i might replace these with some re audio or digital design 10"s for space reasons

any help would be greatly appreciated

have to agree there with swerks. on paper the 360 is a much better unit. it has 5.1 a huge eq, way cooler looking (doesnt matter but thought i would throw that in there) and it also has software that works with it.

http://http://www.alpine-usa.com/US-en/products/product.php?model=PXE-H650

This WILL, without a doubt, be the way to move ahead in the OE integration world. (my opinion of course)