not sure about Internals but i dont think many buy them
Pvrs need Component Cables, alot of SD tvs dont have Component they have Composite or S-Video (480p tops), some do have Component BUT they still will be 480p (not HD)
you want HD, you need a HD tv..... I had bought a Pvr before i had a HDtv, it didnt look that good, not bad but not great
they rock AY, got a pvr and 18 inch hdtv off Craiglist for 170$ not bad at all if you ask me