I have found the Doom to be a FANTASTIC ball for medium AND drier conditions. I would say it would probably end up a bit below the Agent, but my guess is once you saw the ball in action you'd rarely bring the Agent out of the bag.
This ball has great control coupled with amazing power. Since acquiring mine, my average is up 28 pins. (I still have a lot to learn, and it's not all the Doom that bumping my average, but it is a big part of it!) Since I got the ball, I've been using it on every condition I see aside from the heavier stuff. Heck, I even sold half my arsenal because I don't need it anymore!
As far as drilling goes, I'm not the most knowledgeable sod in this area. I would use a strong drilling on the ball, since you describe yourself as speed dominant. Mine has a basic label leverage drill and I can use it in a LOT of different situations. Good luck!