I'm slighlty confused regarding which sets are and are not HDTV compatiable. I was under the assumption that any set that had 1280x768, and either component, DVI or HDMI inputs would be HDTV compatiable. But that seems not the case. The Sharp GA3 & GA4 sets have resolutions of 1366 x 768, DVI & component inputs but yet *apparently* the DVI input is for PC use only, and will not carry HDTV. So how are you supposed to know whether the DVI inputs on set carry HDTV or just PC signals? or have I got this totally wrong?