Well i had an Android 2.1 device for a week and I must say that the simplicity and stripped away feel of the OS was hugely fustrating. For eg changing the theme requires rooting the device.

I had the MILESTONE that packs standard Android with no SenseUi or anything like that.

Also, I didn't find the capacitive touchscreen to being "all that" which the common opinion seems to credit it with.

So be sure to try out as many devices as you can before purchase!