Hi,
IMHO, using an Amiga these days as a sole machine would take a real level of dedication... There's no decent web browser for a start, and most (but not all) productivity-style software hasn't been updated for ten years - an eternity in computing terms...
I'd say stick with WinUAE, or if the reason you're doing this is because of Windows, check out one of the Linux distributions such as Ubuntu (typing in XUbuntu / Firefox right now) as you'll get a lot of functionality and decent up to date software for free - and you'll still be able to run UAE!
- Ali
