T40 vga-out quality

[nowakka]

Hi,

I have a question regarding the quality of vga-out on T4x series models (I have a T40 with ATI7500).
Has anybody tried to work with anything like a 21" CRT with a res, let's say, 1600x1200@~100Hz. Would this be even possible? If yes, what about image quality?
I also have a port replicator II with additional vga-out output - would it make any difference?
I need to upgrade my external 17" pretty soon, and would like to know whether a 21" screen is not an overkill for my T40.