I just got through going at all the different pres out there for rock n roll. I eventually ended up settling for the M-audio TAMPA. It's a very nice preamp, vocals sound real clear though it, it's excellent for DI bass stuff, my mic'ed guitars have never sounded so good to me, it's got and optical compressor that I love, and last, it's got built in digital I/O which I'm very happy with. At the least , you might want to look into it like I did. I believe digitalproaudio.com has it on sale for $349. The price was dropped this month for $600.
Hope this helps