Either the Mbox 2 mini or M-Audio MobilePre matched with the Rode NT1a, trust. I own the Rode mic as my secondary mic myself, here's a quick take on a verse to show you the quality through the Rode/M-Audio (not the $2500 Avalon). No EQ'ing done, just a compressor slapped on it an that's it.
EDIT: Lemme know when you've peeped this so I can take it down right quick.