I dont have any HDMI inputs on that reciever, only Optical or standard RCA, the one coxial is hooked to my CD player. Make any difference in the 35 or 55 choice? Also how about the DVD you cna buy to help with setup, I don't have one now and would it be helpful to improve my picture? I have adjusted the Plasma setup my self when purchased and the picture looks pretty nice in HD now, would you get any big improvement using a setup DVD like Digital Video Essentials: HD Basics [Blu-ray] (2008) from Amazon.