I've had my all klipsch setup for about 3 months or so, and it is great. I've lasted this long, but now I think I'm getting hit by that upgrade bug you guys all talk about. Currently I am running a 5.1 system with RF82 fronts, an RC62 center, RB61 surrounds and an RW12D subwoofer. It's all driven by a yamaha RX-V1900, which does 7.1 and even allows a couple extra speakers to get hooked up above the front speakers (presence speakers). Completely unnecessary...yeah, and I love it so I'll get those way down the road, but now I'm mainly trying to figure out what to do with my current speakers and how to best upgrade to 7.1. I could keep everything the same and get some RS52s for side surrounds and shift the RB61s back, or upgrade the fronts to 63s or 83s and shift the 82s to the side. I'm fairly new to this and am curious what some more experienced klipsch fans suggest. Also, what do you guys think about amplifiers, do they add enough improvement to justify the cost. This upgrade bug could end up costing me a bit over the next couple years...