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As John said, they're good for widefield. I use my 30mm ES a fair bit. It's a good 'finder' eyepiece when looking for objects. Plus I kinda like widefield views because it gives context to the object, the stars are tighter, everything just feels kinda 'cleaner'. And I never really get sick of looking at swirling dust clouds. If I had to get by with only 3 EPs I'd have one that gives the widest views possible with my telescope before the exit pupil becomes too big for my dark adapted pupil, another that corresponds to the best seeing conditions that I'm *likely to have (so it can be used *most nights) and something somewhere in between with an exit pupil of around 1 or 2mm. But yeah, I don't think you need 50 widefield 2" eyepieces.
Cheers
Markus
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