I'm really leaning towards getting the infinity alpha 20's for fronts, the Alpha 37C for a center channel. And either the alpha 20's or the alpha 10's for surrounds. I'm lookin at the PS-10 sub. I'm goin to audition these speakers today again. I'm just wondering what you guys think about them and if there are any others I should audition also. Would it be better to get the alpha 20's all the way around. Or would the alpha 10's do a good job for the surround. The differences are the 20's jump up to a 6.5" woofer as opposed to the 5.25" in the 10's. The sensitivity of the 20's is 89db as opposed to 88db in the 10's. The low frequency response is 55 on the 20's and 60 on the 10's. And the 20's handle up to 100 watts where the 10's handle up to 80 watts. I'm hooking this up to the onkyo 501 and putting it in a room about 12x15. I'll be using it for about 25% music, 25%gaming, and 50% movies. Thanks a lot.