bro num1 thing is watever u do bass of a sub can never be compared with woofer and that was my entry in audio stuff if u want a very balanced sound then get 6975v2 they r excellent atleast to my ears very good bass response and crisp sound when mated with an amplifier,if u wanna go v loud u can get 2 pairs.if short of budget and want 2 pairs then get 2 pairs of used 718 they r good but with time when u will understand and get deep in these things u would start to dislike them i used to have 2 pairs of 718 1 in car other at home but sold them as after 3 yrs when i heard to sth better i realised it.u can get 2 pairs of 718 and add a 4 channel korean amp but in my books just 2 pairs at the rear wouldnot be a good idea get yourself a pair of 718 if short on budget or 6975v2 both r good for their price if budget is not an issue get 6975v2 a pair of front door speakers and a 4 channel amp in the future if u wanted a sub just get a sub and another amp to have a complete good soundsystem.rest let sum senior member to come and comment.