For computer recording, I would suggest avoiding these mixers. Unless you buy a multiple channel sound card, all your going to get is the mixdown of the signals into your computer on a mono/stereo out; you just have to hope you had the right mix and processing. What may be better for the job is an Audio Interface, where every mic is on it's own dedicated channel and you can do non-destructive editing/processing/mixing right on your DAW, as opposed to trying to get it right the first time. An Audio Interface would bypass your soundcard and would also provide you with a means of playback, so it's all you would need.
I would recommend the FP10 for drums if your computer has a firewire 400. It's cheap, expandable and lag-free 8 mike preampshttp://www.presonus.com/products/Detail ... roductId=3
There is a variety of AI's in both firewire and USB 2.0. Just do some research.