just to let you in on a little secret...well, maybe not a secret, but a great tip:
if you plan on using 8 channels to track drums, you'll want more than 8 total inputs. if you're asking "why?"....it's because you'll want to get a scratch track of the guitar, if not also the bass while tracking drums
take my word for it - track drums ONCE on 8 channels, then try to overdub guitars over it later with no scratch, and you'll never do it again. the same thing happened to me the 1st time i stepped into a studio - our drummer was engineering, and used all 8 inputs for the drums. i played along with him as he recorded his part of the deal, then had to record my guitars over raw drum tracks later on. needless to say, i was hating life for the next week - especially since it was my 1st time being recorded while playing.
of course you might be alright if you aren't doing extremely technical death/grind stuff...but i thought i would throw the warning out there, because there's nothing worse than dropping a bunch of bones on an interface, and thinking shit's all good, then smacking your forehead later on and wishing there was ONE MORE FUCKING INPUT FOR A SCRATCH TRACK!!