i dont know to much about speakers so here it is... i dont really want to go with subs for 3 reasons: #1 too much weight #2 takes up to much space in trunk and #3 they are too expensive. so i have decided to just replace my stock 6x9's in the back with some better quality ones that will still put out some good bass. i dont have the Bose system so i have the CD deck with the EQ controls on it. some input on this would be greatly appreciated!! thanks!