I may be biased (and I am certainly not familiar with a lot of gear) but My Focusrite interface has been great and it is capable of recording a multi drum set up. I however own the Scarlett 18i6 which runs about $300.
The good thing is it runs via USB 2.0 so that avoids potential problems with Firewire (before buying anything firewire for audio be SURE your firewire chipset is the preferred Texas Instruments chipset... there is tons on the web about this) or be prepared to invest in a decent firewire card and have a free PCIe slot on your MOBO to toss it into. FW cards aren't that expensive but still... it's an extra component to worry about. You will get more throughput and possible speed but AFAIK USB 2.0 is actually capable of handling everything FW does unless you are recording a RIDICULOUS amount of tracks at once. A multi drum setup does not fall under "ridiculous" track count.
With the 18i6 you are going to need a mixer to run your mic's into and then into the line ins on the back to access all 8 inputs (two multis on the front and 6 1/4" line ins on the back). You can also add an extra 4-8 tracks via the ADAT input connection on the back by using another interface or expansion box (like the Focusrite Octopre or really any other interface with ADAT out). You can get 8 extra ins via that ADAT in at 48khz samplerate or 4 at (I think) 96khz.
These units are NOT the lowest latency units out there but with a half decent system you can get down to 12ms roundtrip in Sonar or less without problems (at least in my experience) which really noticeable to MOST musicians while tracking.
That said the PreSonus boxes are supposedly quite nice and a good price. It was between Presonus and Focusrite when I was looking to update my interface (I used to use an Echo Layla 3G but my new system unfortunately used bridged legacy PCI which I was unaware of and it was causing problems... you want Native PCI which many newer boards do not have... the more modern PCIe is fine but obvioulsy old cards don't fit in those slots).
I am however a little skeptical about a $150 interface that can handle that many inputs. Most of the $150 range stuff only handles 2-4 line ins. Maybe you have found a deal but be sure to check all that out, scour the net for reviews and most importantly check to see if they are keeping the drivers for the unit updated.
Focusrite, aside from a very minor blip about a year before I bought my interface, seem to be VERY good at providing solid and timely drivers for their stuff. Also their mic pre's are legendary so those multi ins are likely going to sound better than most other gear in the same price range. That of course only applies to when you are using an XLR connection to hook up to those multins (as far as I know). I also think their Hi-Z/Instrument setting on the multi ins sounds pretty darned good too (but not as ideal as more proper preamp stuff for guits but that's another topic).
So yeah... Presonus and Focusrite seem to be the two companies that give the most bang for the buck, the most solid devices with the best drivers and the most happy customers in that price range. To get anything better (or even as good) you are likely going to pay much more. Because I actually OWN a Focusrite product though that has made me very happy I can safely recommend their stuff.
Cheers.