I have an M-Audio Delta 1010LT, and so far I've never had to record more than 4 tracks simultaneously. I'm recording a properly mic-ed drum set, and have 6 mics going into the computer at once. I feel that buying a bunch of these seems a bit clunky, and I'll lose some quality just going straight from XLR to RCA. Not to mention two of these mics are condensers, so I need to get phantom power to them somehow.

Now, maybe this is a stupid question, but is there a single, relatively cheap piece of hardware that can convert all of those signals while still letting me record all 8 tracks separately? I don't want a mixer that just has stereo RCA out, that's no good. Would I be ok if I just bought this and a bunch of these?