After doing alot of reading about JBL speakers and stuff I am narrowing down my choices. What I am wondering though is how various sizes of speakers flow with each other... The center has 5" duals, so what would be the best match for surrounds? My thinking would be the E20's since they have 5" speakers. But then when I look at mains I think that E30's would be a better surround since they have 6" speakers and I will get at least dual 6"s for my mains if not 8"s. I've heard people using e10's with e100 mains and they have had no problems, or they say it sounds good. Since the center does most of the work for HT, I guess I would match the surrounds to the center and then worry about the mains for my musics. What do you do?