how are your kayaks in the rough...wind/ wind waves/ boat chop...how rough i guess is too rough? if i go up a certain tributary from the columbia where it will be calm and then come back and find out the columbia is ripping am i gonna be in trouble? or the ocean....if i go way out and the wind starts up.....
am on the verge of getting a revo or an outback and another for my daughter or a fishing buddy for that am thinking ocean kayaks trident.... oh heck maybe a revo and an outback.
If you're fishing in places where you have to worry about strong currents, e.g. the Columbia near Astoria or Tillamook, then you need to plan your trips according to the tidal cycle. The currents in these areas can easily get strong enough that you won't be able to work against them in a kayak.
As far as really choppy conditions go, it's like fungunnin said. It can easily boil down to personal preference. I've played around in Tillamook Bay with my Revo in 3-4 foot wind waves and I felt very comfortable. Others may feel more comfortable in a boat with more stability, such as the Outback. It's also about being comfortable in your kayak. It's important to know how your kayak reacts to certain things, like large boat wakes, surf, wind, etc.. The more comfortable you are in your kayak, the better understanding you'll have about what your limitations are.