I have a Yamaha RX-v1000 Polk RT35 fronts, RT10 surrounds & the cs245 center along with a HSU vtf-2 sub. Using my on-screen speaker setup on my Yamie I have a choice of large or small for each speaker. Now, I assume the RT10s would be set to small(or am I wrong?), but I dont know what to set the other 2(center & mains)to. Again, thanks for your help-this forum has been very helpful!