Its frustrating because it does not seem like you
1) know what you want; or
2) are willing to find information yourself. There is a lot of information on this board, and you keep asking the same questions over and over again.
You say you want an LCD because its cheap and easy, yet its not as cheap or easy as just getting a CRT and building a shelf. So I am not at all clear why you want an LCD in the first place.
I don't mean any disrespect, but a LOT of information is on here, and if you did a little work, i.e. read Blanka's posts, whom someone even posted the link to, it would clear up a lot of your confusion as to what makes a good LCD and why.
Finally, the question as to what is the best monitor is a question of personal preference. Some people swear the only way to do it is to get a cga arcade monitor, others like CRT, some like LCD, its all a matter of preference. Me? My preference is S-video TV; Good LCD; Arcade Monitor; CRT monitor.
I find the S-video TV option to be the cheapest, and I like the picture the best. It looks the most authentic to me and requires less tinkering in the settings to get it to look good. My second place vote would be a good LCD because it lets you build a slim cabinet, and I love the way slim cabinets look. Arcade monitors IMHO are overrated, and Large CRT's are harder to find than an S-video TV. So that's my ranking and rationale.
You have a full size cabinet with room for a CRT. If I were you, I would just get a TV, put it on a shelf and be done with it.
If you insist on going LCD because you like the way it looks better, then I would get a 4:3 21.3 inc LCD. You can find one on e-bay for between 150 and 200 bucks used.
If you want a widescreen LCD, for cheap, I would try to find a va or ips screen. Or if you just don't care, get whichever one looks coolest. Nothing is going to look horrible, some things will look better than others, but to you it might not be worth it to pay the extra price or whatever. Its all about personal preference.