Save your money, use the Allen Heath pres (just as good) and compress in DP3 after the fact (probably better!).

If you have to limit while tracking, try to find an ART MDM-8L. It's an 8 channel limiter that sounds pretty good and is quite affordable. I used one for drums when I was doing a session on some ADATS. I was actually pretty pleased with the raw tracks before mix.

If you are tracking to ADAT yes a limiter can help.. at tracking or mix, because you don't have that ability within the ADAT. But to DAW, just wait and do it with plugs.. unless you have some real good comps and limiters. Cheap compressors sound awful.. don't waste your money..

Actually the presonus comp does sound pretty darn good and gives you alot of flexibility when tracking drums. However if your looking into that piece basically just for drums I would say that gentle limiting going into a DAW is best and the presonus is way overkill.

i like to tame peaks with some RNC's in supernice mode then really shape my sound or squash it with plugs once inside. it is possible to go without comps. into a DAW, but those dynamic peaks can be a btch and I like to record pretty hot as my rig seems to sound best that way.

there are cheaper alternatives that will work just fine, you'd be suprised!