I left my stock radio in place and mounted the new head unit under the dash, it fits snuggly between that and console. I picked up a plastic adapter for front and mounted 2 Coustic 4" co-ax speakers with original bracket. I mounted 2 Kenwood 6x9's behind the seat by cutting holes in the frame behind the seat (structurely, maybe not the best to do, but I reasoned that it was relativily small surface area). These speaker fit in the the other brace well. It sounds ok. I plan to replace the 6x9's with 6.5 components with external mounted tweeters. A serious stereo friend wants me to mount a single 12" in the trunk, which could be removed at shows, etc. The speakers up front sound real good, but not much separation.

I like the head unit location, works with a remote, ties in well with dash and console. With removable face, you can take with you.