Hey guys..Am seriously considering some Alpine SPS-690A 6x9's 250w 3 way. How do these rate with other speakers on the market please? I already have Alpine head unit, Sub/Box, 6cd changer and Mosfet 4 channel 500 watt amp, is it better to continue with Alpine as most of the other stuff is...or is the amp so sh*t it wont make a difference?? thanks for any help