I used to use drum loops from Beta Monkey and was pretty happy with them. I got some from Drums on Demand, but thought the song sets were a bit too limited and processed for my taste. YMMV - it's been a while since I've looked at what they offered.

Eventually I got enough money and moved on to Toontrack's EZDrummer and stuck with the canned tracks that came with it.

Then came EZDrummer 2 with the ability to edit tracks simply by dialing the complexity of particular instruments in and out, which is really cool.

I'm sure you know that they've got Southern Soul and Blues kits, along with MIDI tracks. If you don't need to sound exactly like classic hardware, they also sell the MIDI grooves from the Blues and a different Soul Grooves MIDI. (Based on this comment, you'd probably need to get additional grooves even if you got their Southern Soul EZX).

You might also have a look at RealiDrums to see if it fits your workflow. Like EZDrummer, you can dial in the complexity of canned grooves to customize it. Unlike EZDrummer, it comes with a boatload of different drumkits, so you can really customize the kit.

I haven't been able to play with it, and I'm curious if anyone on the forum has. I know that Jim Fogel was looking at them, but don't know if he ever took the plunge.

-- David Cuny
My virtual singer development blog

Vocal control, you say. Never heard of it. Is that some kind of ProTools thing?