hey all, need thoughts on klipsch xf 48 system compared to def's sts at 1500 more. understandable that the sts has power sub contained in tower where as the 48 does not. don't know what advantage a power speaker like xf has when running a 3808ci or equal?the xf's has separate sub incl. where as the def's does not. my understanding is that the def's would need a sep sub also; which means more $$$ any thoughts would be appreciated thanks