I have a Peavey "Combo 115" (210wattsRMS@4ohms into a 15" black widdow) My first choice would be to convert it to a 2x10"+tweeter w/attenuator (like the Peavey combo 210 that came out a few months after I bought mine), but I think this would be more trouble/money than its worth. But, how about adding a tweeter/attenuator. How much would it cost? Where could I find the parts? How would this affect the load on my amp? How about one of those 5" drivers (like on Acme cabs or Hartke 4.5)? Thanks for the feedback?