The presonus firepod is surprisingly good actually. It has 8 inputs IIRC. I don't own one, but my friend and bandmate does and I like it. I don't know what you mean by "reasonably priced", thats highly relative. but i believe theres a factory restock firepod on musiciansfriend for 399 at the moment, and you'll likely be able to find them on ebay.
However, its firewire, and if you use a PC that might be tricky. Even if you could get an interface that had 8 Channels of conversion over USB, I wouldnt want it. USB isn't generally considered to be fast enough for more than 2 I/O channels at any decent latency settings I think. I might be wrong with the new USB, but i think most of the interfaces use usb2 protocols anyways.
If you dont have firewire and want multiple inputs you're going to have to get a PCI or PCIe card that plugs into an external box housing the actual convertors. To be honest, therse no cheap way to do it and thats likely to cost you at least 600 dollars, and probably more than a grand for a good quality unit.
Theres another option: If you have Toontrack Superior Drummer, EZ Drummer, or any similar software, you can forgo microphones and place triggers on the drums. plug the triggers into a cheap trigger to midi convertor (one is available from alesis for 150 i think) and then go midi into the computer and use the 2 mic preamps on your USB converter to record the overhead microphones. Once you've recorded the midi performance, use software to replace the midi signals with recorded drum sounds. Its not cheating IMO - you've captured the performance, you're just replacing the sounds with recorded samples. I'm starting a pro level studio and I still do this with many of my drums. between you and me, for many styles, the drum kit you have and the room you record the drums in probably aren't gonna sound as good as a well selected sample bank anyways (just my opinion, some people can get marvelous sounds).
Hope it helps
EDIT: PS: If you decide to go the midi route for drums, the TASCAM US-144 mkII has two microphone jacks and midi connections (as well as SPDIF if you need it) and I think its a very good unit for the price. It also self monitors, preventing the excess strain on your CPU that latency free in software monitoring introduces. It connects via USB.