If you're using Pro Tools to record none of the MBOX 2 family units would work as they have a max of two mic inputs and you would want to go using more than two mics. A 002 or 003 would do the trick, it has 4 mic inputs still I'd probably go for more than 4 mics for a drum set. It also depends a lot on what genre you're recording and if you want a lively sound or a more direct (For lack of a better word) and panned sound. An expansion for the 002 or 003 would be an ADAT which would give you up to an extra 8 mic inputs, it's really good for the long run but all of that is really expensive.
If it was me I'd go and buy another interface (Cheaper non digidesign, would be just as good) with more mic inputs and record the drums, on another DAW other than Pro Tools, using more mics and then take the wave files recorded in the other DAW and import them to pro tools to mix and work on them there. Its probably a lot cheaper than going ahead and buying a 002 or 003 and an ADAT for more than 4 mic inputs. It's also not a big deal since you would only use the other DAW to record and thats pretty much the same in every program.