Just to throw another thing into the loop. If a mixer is waht you are after. I know all about agonizing over which one to get/what connections/how many pres etc.
Mackies are decent, Behringer.... another story. But if the Mackie is eating up too much of the budget, there is a third option that is not Behringer: check the Yamaha MG mixers. I just bought an MG 16/4 yesterday, and head to head against
my Behringer MX 602A the pres are a distinct improvement. I can't say I hear a great deal of difference in teh signal it generates, but there is distinctly less crackle/static when the pres are cranked up high, and that makes a world of difference to me. I haven't done much work with this board yet, but it is very flexible.
The MG 16/4 is cheap ($275 ish), has 10 XLR preamps, an alt 1/2 bus and inserts on 8 of the preamps. This can generate up to 14 different outs (8 using inserts as direct outs, the alt bus for 2, teh main bus for 2 and the two fx sends for 2 more), and you could hook up powered monitors to the control room out (note: if you get powered monitors you don't need a power amp, but passive monitors do require a power amp).
There is only one headphone out, but if that is all you need, you are set, if you need more you can buy or rent a headphone mixer with mroe outs.
I am using it with an Audiophile 24/96 card ($150?) which gives me two in/outs in analog, and has a S/PDIF in out as well. If you get an external D/A converter, then it is a 4-in/out card. Even though they are unbalanced connections, I have not yet noticed a problem with them.
As I also want an external compressor, although it may not be the cats meow, i have
a TC Electronics M300 on order. It is a two-channel FX processor with reverb and other effects (ie compressor), and is also D/A A/D converter ($199?)
That would run you $650 for all that gear (not incl. monitors), and by no means is it great gear, but it is flexible and decent.
I have to admit that for drum recording this is a little limiting, but with taht mixer you could put 6 mics on the drum kit and premix a few of the drum tracks to bus down to 4 ins to the soundcard.
With the extra $350 that you save with this route, you could opt for a Delta 66 card, and then you would have 6-in/out if you hvae the external D/A converter to use the S/PDIF in. Still have money left over.