The only problem I've found is that CRTs have much higher resolution than all but the extremely high end LCDs. And by extreme, I mean over 10 grand each. Don't get me wrong, I'd love to go digital LCD, but I've got two 21 inch CRTs running 2k x 1.5k giving me what feels like an acre of landscape (4096 x 1536 pixels total)
That really high end company mentioned earlier in the thread (9x graphics?) has an amazing 3 screen super system that has way more real estate than mine, but it retails for over 48 grand!
On the other hand, I live in the Southern USA (NC), and my office is over the garage - it get warm in this room, and summer is settling in. So, maybe I will invest in some cooler equipment, that way I can stop wiping up my chair

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Also, be advised that there is a new triple monitor high end video card coming out near the end of June. Called Parephallia (sp? same thing as sundogs), I think it is from Matrox. Guesses on the street price range from 200 bucks to over $500. It sounds like an awesome card, but is only vaporware so far. If it rocks as much as the specs suggest, I'm getting one. And probably my first LCD monitor.