I showed up here because I just bought a Boss DR670 on eBay (it's not here yet) and was looking for any info or insight I might find.
I've been generating and using midi tracks/loops in Sonar using soft drums such as the drum kits included with Kontakt, Garritan Jazz and Big Band, and Natural Studio. I'm not a real drummer at all, so I thought a drum machine might simplify things, as well as save on the CPU/memory hit.
There are alot of people programming drum machines and using MIDI, sampling, etc... on this site. I was a MIDI guy for a long time, but I now use real drums and bass, etc.... For the longest I was programming MIDI bass, drums, keyboards, etc...
(It appears that I must insert this parenthetical filler because my response doesn't meet the forum's ten-character minimum requirement. Please forgive the surplus verbiage.)