what do you guys think of these? good, something better for the money? subwoofers a must to run with these? after playing this weekend I decided our PA is not up to par with what we need so my next investment will be the PA and I want to do it right. 4 piece cover band playing bars, anywhere from 30-500 people i would say, also do private events which can be outdoors, halls, etc. I been debating on going with these powered or maybe some dual 15 mains off of an XTI 2k, also considering a pair of matching 18" subs like the QSC KW181 to run with either or. looking for opinions from the experienced, so im not throwing money away, my existing mains will become monitors for the band since they are little mackie 400watters.