My advice is to go with the Revo. It is plenty stable (granted, the outback wins that area hands down), and cuts through the water unlike the outback. I have taken mine out to fish the Point Loma kelp, and played around with the waves that break out there off the point. I never really felt like I was going to tip even when I went up some pretty large swells. I've tried both, and have ended up owning two Revos. (Don't forget, you will become more comfortable with the stability over time as you use the kayak, you won't be able to make it faster though) You can load it down with tons of gear and a full bait tank, and still haul ass. Definitely get the Turbo Fin upgrade no matter which kayak you choose.
As with any kayak you should test it before you buy it, don't just take our word for it.
The guys at Fastlane are really helpful and will point you in the right direction.