Juro, I have fished out of my Necky Looksha IV and it is a poor fishing craft. But I don't think that I would enjoy paddling some of those fishing tubs out there. I think that when I get another yak, it will be either the Wilderness "Freedom" or the Heritage "Fisherman". Both of these look like a better combination of performance and fishing.
Here are some thoughts: Most of my fishing spots are not so close to the put in, and I like to explore. A faster boat = more fishing time.
Sit on top vs. Sit in side. Can most people roll their Kyaks? So you might be swimming any way. If it is cold you'd better be in a wet suit. SOTs are easier to get in and self bailing to boot. If it is warm, you'll apreciate the open deck.