Cheap but cool are those sets, like the samsung ones, with a "cool" looking design to them, but very cheap. The R7x series will do.
I think you should stay on LCD cause with plasma you'd have to worry about burn-in, which for you is more risky as the set will likely be left on for hours and hours on end, maybe with static images like logo's (if you show MTV stuff for example). With LCD that worry just isn't there.