I believe you can setup the AH resolution to what you prefer (presuming it's supported by your hardware) so that you don't necessarily have to use a widescreen resolution.
I know an LCD won't touch a high quality CRT's performance, but with this monitor dying, and no 21"+ CRTs, my options are small LCD in standard format, a large widescreen, or nothing. Skuzzy may well be right about LCDs, but since there's nothing else that's within my price range (or even available around here), I don't see any real choice. I played AH1 for a while on a 15" crt with a 466 celeron. Surely it can't suck as much as that did.