I was looking at a new sound system for my new GTA. I was thinking about Alpine SPX-177A 6.5 Comp set. I have 400.4 RF amp and i think you can Bi-amp these speakers which would work well with the 400.4. These would be the only speakers i would run for my front soundstage. I wont run speakers for rearfill cause all they do is rattle. For a sub i have a 10" Type-R Alpine which im interested in putting in a Stealth style box where spare tire used to go. Fed with a good supply of amp power from a RF 350S amp. I think this would be good sounding setup that should play just about anything. Would anyone recommend anything else??