Hi, here is a run down on my experiences with spec skis which I hope can be of help.
I paddle in Christchurch NZ, where the trade wind from the east is always blowing at night, meaning lots of chop, surf or "slop" to paddle in. I have both a Hayden PR3 (a step above the Hayden Fatboy mentioned above) and a Fenn Elite. I have probably paddled in the ocean on spec skis for 20 odd years, although a whole new world opened to me three years ago when someone mentioned I should buy a OCR ski for something different.
I find the Hayden PR3 is similar to the Fenn Elite in terms of boat run, feel and stability. They both have a cockpit which I think helps it feel more like a OCR ski than other spec SLSC skis I have paddled.
The PR3 is a good ski, runs well in most conditions from flat to the chop although for me it seems to wallow on the top of runners coming home a bit more than other spec skis. It seems to have a lot less volume in the tail than other spec skis which might have something to do with this. My PR3 has two venturi's which drains water from the cockpit quickly although if your waiting in the surf for a break and not moving, you will find the cockpit's not going to drain and you then have a cockpit of water to move when you start going forward.
I would say that from my experience, the PR3's not a ski for beginners, or someone wanting to learn to paddle in the surf.
I have paddled the Fat Boy ski from Hayden as well and found it to be a good ski as well, not as tippy as a PR3. The review linked in one of the comments above is pretty comprehensive so there is not much more I will add other than you will have to be prepared to put some time into getting comfortable on this ski if your a beginner. Its quite stable in the context of other spec skis I have paddled, but its not really a pure beginners ski.
Dolphin surf craft make a 580 model ski which is a little more stable, seems to have a flatter hull and less volume in the nose than a PR3 so that might be worth trying. I found them to be a solid ski, relatively stable with good boat run. It picked up runners all right and was quite responsive to steer.
I think I would agree with what other posters are saying about looking at a Fenn LS ski. I paddled one this year when they showed up in NZ and for learner paddlers in my surf club, its the way we will be going in the future. They are solid, appear to be well made and seem to run well enough going in and out of the surf. Above all, the price is right for learners (well in NZ anyway). In terms of stability, I thought it was a touch better than the Fatboy, although that's just my opinion based on one paddle.
One advantage of a Fenn LS ski that can be overlooked, is that the foot pedal position is adjustable and that's not usually standard in other spec skis. I am sure I am not the only person who has ordered a spec ski and then spent the next two months sweating wondering if I got the leg length right. Its a small thing, but if you get a spec ski with the wrong leg length, its a big problem.
If your spending a few thousand dollars on any ski, better to wait a few weeks to get something that's going to work for you, rather than hurry into something that's not suitable in the long term.
Good luck with your ski hunt!