Here is my setup: P4 2.8Ghz with Hyper-Thread enabled, 1GB RAM, Radeon 9600, MCE 2005, PVR-150MCE, FusionHDTV3 Gold, HTPC 1280x720 DVI output to my RPTV.
I am also getting shuttering HDTV playback in Media Center(also worse picture quality), however, if I use FusionHDTV's player it's perfectly fine. So looks like it's a common problem. The problem is I have no option to configure the video/audio settings(unlike FusionHDTV's player, you can configure DxVA/software decoding etc). Anybody with a P4 3.2Ghz has the similar setup? Still have the shuttering problem?
About the analog TV card part, I really hate that I have to spend $70 and get PVR-150MCE just in order to go into the TV setting part of MCE2005. After that, I can disable the PVR150 in control panel and the digital tuner still works fine(but can't go into TV setting again).
Also, I am having trouble with SPDIF output of 5.1 channel audio(I have a AV-710 audio card with SPDIF to my receiver). MCE2005 is giving me a lot of trouble, not really worth it.