Thanks Shady, frankly my real interest isn't necessarily improving on the RC263 unless there were matching towers that demanded it. I was curious about the PSA and others and can keep an eye out for those. I think I would be interested in upgrading from the R263 Towers potentially with something that goes well with the RC263. In your opinion, is it better to stick with towers and center that match? Not sure if you have heard the R263's or not. I know that the JBL 590s match the RC263 very well surprisingly. So I could fit 580s instead of 263s but most I have asked on this topic say that wouldn't be worth it unless I find some used cheap just to try for fun.
Also tempted to look at revel's but as those 263s are known to be modeled after some of the revels, I wonder what level of Revel you have to go before getting to a meaningful differential. This is where I should just not look at speakers and stay where I'm at but it's too fun to always be on the prowl