First what would you rather go with 2 RE 12"s or Three K-series 12"s secound do you nkow any websites that sell RE. Last with either setup will 2, 5x7's and 2, 6 1/2's be enuf to crank out the highs pretty well for my system they will be amplified an they r pretty good 5x7's and great 6 1/2's