I'm not sure what your budget is ( $400 the cost of your 3 song ep ?) or something more.
If your budget is $400 ignore the rest of this post.
I highly recommend the RME fireface 400 ( firewire ) and a behringer ada8000, the ff400 has 2 mic pres & 6 line ins for the 6 tube mic pre's you already have.
Then the ada 8000 has 8 mic pres via lightpipe for a total of 16 ins and at least 8 outs.
while some people aren't fond of behringer products my ada8000 has worked perfectly and seems fine for tracking drums.
Not sure of the cost of a ff400 in your town ( part of the world ) but both my ff400 & ada 8000 cost $1700 ausie, and so far has been 100% trouble free ( about 18 mounths old now ) and i've used this setup with REAPER onsome 12+ hour tracking sessions absoutly trouble free, that alone makes it worth every cent in my opinion.
Just some food for thought.
Cheers