What's your go-to drum buss compressor?

Not a compressor per se, but I love McDSP's Analog Channel, which compresses the signal more as you drive the input more and more. Awesome for gluing the drums together, and it sounds natural.
 
In the rare instances I actually use drum bus compression I don't have a go-to. I've toyed with everything from Stillwell's Rocket to the Waves SSL bus comp to the Waves API 2500 to the Elysia Mpressor to the Softube CL1B. I have a feeling in the end I'll likely move my GSSL over to drum comp/parallel duties after getting a better master bus compressor.
 
gclip. ;-)
i dont really like compression on drumbusses for metal.for rock its the 4k by uad.