I started with Peach Sunrise, and ran that for a few months. It is a very good ROM and might be the best for someone familiar with the stock Exhibit II.
I tried RebelRom about two months ago and it is great. It's a bit more advanced, but nothing that would be a problem for someone that has already rooted their phone.
I tried CM10 a few days ago and loved it, but had to nandroid back to RebelRom because of an issue that I am still working through. CM10 might be my preferred ROM once I get my problems worked out. It looks great with the inverted-color theme.