A good quality LCD is much more hassle free than a CRT but the benefits of such huge CRT are a completely different ball park from a good 17" LCD. Really the only thing these monitors have in common is their price. Obviously you need a monitor and because you're looking and don't really know whether you want a huge CRT or an average LCD I'm thinking that you've never really considered what you might want the monitor for. CRTs are yesterday's solution, while LCDs can still be considered today's and tomorrows solution because they have yet to be "perfected" as they aren't as flexible as CRTs and are far more expensive. One thing I have learned from this is that I feel a good LCD can be fairly hassle free, you plug it in, set it to its native resolution and you're set and perfect. Only "hardcore diehards" will swear solely by another solution like some of these crazy dudes in here, and because you're asking in the first place I'm going to assume you aren't as crazy.
IMHO LCDs of today are acceptable for your average range of tasks, and considering their advantages they certainly are going to be the future of computer displays, whether or not you want to invest in such relatively young and quickly developing technology is up to you, you'll see some of the downsides of these "earlier" models but you'll get all the advantages CRTs cannot boast.
On the other hand you've got a CRT solution, certainly seems like a relic at first glance but the technology certainly is mature and the dissadvantages will most likely be overshadowed by the other feats it will easily shine very brightly in. Vast desktop space, crisp and high resolution support, fast refresh rates in the higher resolutions as well... But nearly all 19"+ CRTs are unacceptably too big for your average desk space, if you can find a good place to stash a huge CRT and keep it there then you should be set for quite some time (a good 5 years I'd think, I've got a nice 19"er that's 6 years and still very very good)
From your intial post you seem to be satisfied with how the LCD is working out for you, and considering your rig I don't know if you'll need to go any higher than 1280x1024 for gaming unless you plan to play some older games and grab youself a newer card to run the resolutions a 22" CRT could provide a significant difference for you over the LCD. And as far as text the LCD should work really good unless you want more space for the text. I dunno, unless you are unhappy with the LCD I'd say keep it and get used to what we'll all be eventually using...
