The only catch with high-end flat-panel TVs and monitors is that there is usually a significant delay through the input processing circuitry. You'll want some to do some testing, to get the timeline offset dialed in, and if you're using a DV converter, you'll never get consistent offset while looping..
The Syncheck is a great peice of gear for calibrating your offset, and a card like
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the Aurora Fuse-X is a great option for outputting video to your new display. Fuse-X plays any QuickTime compression format from within any QT-compliant application without interference or interaction with the application.