Definately save some cash and do all the install work yourself. Speakers are a snap. Especially the rear ones in a SHO.
Speaking of rear speakers, I installed some speakers in my girlfriends 96 (or was it 97) Geo Prizm (Corrola). Talk about a PITA! To access the rear speakers you must remove the back seat, and the rear shelf (which also includes removing the 3rd brake light). The seat bottom was quite a trip, you must pull it straight up to unhook it, now this requires a lot of force in that solid little geo, so much so that when it finally broke free, my head launched itself into the roof of the car. After the dizzyness and blurred vision stopped, I finished the job.
BUT, I digress, I'm only rambling because here at work, my feverish typing makes it look like I'm working. The rear speakers on the gen 2 SHO are a snap, simply pry off the metal cover and there they are. Up front you'll need to remove a few screws, then just start prying up the edges of the door panel until all the little plastic snap fasteners have unsnapped. I reused my originals (after several door panel removals), and they still hold pretty well.
You can modify the rear sub box to squeeze an 8in in there, I have a Polk/Momo in mine, but I've also got an aftermarket amp to get a little more thump out of it.
Tim's got me beat in stereo costs...All my stereo components probably cost about 650 dollars, but hey, it gets the job done for me. My speakers I had purchased at Circuit City (older Infinity Reference), at the time I figured I had got a good deal...I wasn't into buying things on the internet at the time, I wanted them right then and now! You can also check out
www.crutchfield.com and
http://www.cardomain.com/shop
