Well, you're talking about a pretty high-res screen, then. I agree that it would be best to find one to look at yourself, but I think that will be difficult.

So, just know yourself... Are you old enough to have started using reading glasses? Do you have a hard time reading very small text? If not (like me for a few more years, anyway...) I strongly recommend the higher resolution screen. Especially if you're any kind of "power user" at all (multitasking!!!). If you have trouble with small text, then you might be better served by the lower DPI screen, at the cost of what I call "screen real estate."

If you're borderline... well my WSXGA+ ThinkPad has an easy-to-access mode that switches quickly to WXGA (1280x1024) mode by pressing Fn-[Spacebar]. If you come across things every now and then that are too small to comfortably read, you can make that switch quickly, and then switch back. If you are going to spend the bulk of your time at WXGA, you'd be better off with a native WXGA screen, to avoid the artifacts that come from using a non-native resolution.

I keep saying WXGA and WSXGA+ -- keep in mind those are the widescreen counterparts of the resolutions you're considering... so just substitute!