Presonus and Echo both make fine, (relatively) inexpensive interfaces with XLR inputs, in addition to balanced 1/4".
Presonus just released the Inspire 1394 (they can't call it Firewire legally) with 4 channels, 2 XLR ins and 2 unbalanced 1/4" high-z (read: plug your axe straight in) inputs. It's listing for about $200, I think. The best part? You can daisy chain up to four of them for more channels and inputs, just buy another one if you need more ins. Shoot, I'm thinking of picking one up, and I don't even need it really. Might be worth looking at. Oh yeah, it comes with Cubase LE, ACID XMC, 3 gigs of drum samples, and a ton of other goodies, too.