Studioprojects VTB-1 jumped to my mind right away also.
Workhorse/GoTo type tool here. It's usually a little over $100, and makes a nice preamp for any interface. Turns your mic input into a nice clean Line level input.

Got my first one when Mac suggested it years ago. Still think it's a great deal.


I do not work here, but the benefits are still awesome
Make your sound your own!