I have rti4's(mains) csi3(center) pb-10(sub) crappy klh's(rears) and a HK 435. I have enough $ to get the rti8's as mains but not sure what direction to go. For roughly another $150 I can get lsi9's as mains and save up for what i assume is the correct center channel the lsic. Here is my question though. Could I be able to use my rti4's as the rears? Also will that even be an improvement over the rti8/csi3 front stage? And Finally will it even matter considering they will be powered only with my HK? I might get an amp later but that won't be for a loooong time so don't factor that In. So final tally lsi9(mains) lsic(if correct center) rti4's(rear) pb10(sub). Let me know if thats a good/wise choice or should I stick with the 8's and complete my setup. Thanks!