Hallo, I am a happy Eye TV Hybrid user. The only thing I could suggest you is that higher resolutions require MUCH more cpu and graphics power. I am using it with a PowerBook G4 1.67 Ghz and 1.5 GB of ram. When eye tv is running full screen, no other applications are allowed. EyeTV is really a great piece of software.
Works well with both Tiger and Leopard (tested with a Mac mini G4)
bye
Andrea