Jason, from rather casual observations at the stores and studying reviews(most recently the December issue of Consumer Reports), I'll make a couple of suggestions. At that distance a 40" LCD would be appropriate, and if it fits your budget I'd first suggest the Sony KDL-40XBR4(top of the line, 1080p), or a little lower in price the Sony KDL-40S3000(720p, but plenty for that screen size at that distance).

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Enjoy the music, not the equipment.