I picked up a used Wilderness System 12 foot Pongo Classic this spring. This kayak's cockpit is very roomy, seat is quite comfortable, it tracks nicely for a short vessel and is surprisingly stable; seems in calm waters one would almost have to flip it intentionally. There is one exception, pulling ashore and trying to stand instead of first sitting on rear deck behind seat and extending legs to the side. Initially attempting to stand and exit led to flipping in less than a foot of water with onlookers. This kayak is also pretty darn durable.
Have loved my old yellow one for many years. Highlight was a three-day (two nights camping) on the Buffalo River in Arkansas.