I just ordered my first set of Polks; a pair of TSi400s and a CS20 for the center channel. I didn't order any surround speakers yet because I'm not sure which way I want to go. I have a Yamaha RX-V573 7.1 channel AVR to connect them too though I'll probably start off with a 5.1 setup first and think about 7.1 later. So my questions are;
1. Am I likely to notice any tangible difference if I bi-amp the fronts while I can with the two spare channels?
2. Which left/right surrounds would people recommend? I like the idea of in-wall speakers but I don't know much about them and I'm not sure which ones would be appropriately timbre matched with the TSi range if any. If not in-walls which others would be good choices?
Any advice/suggestions/recommendations welcomed gratefully.