i just picked up a 15 alaskan with an open floor(just like the one in the picture but has 2 shelves(i imagine they support the sides) in the back instead of a bench seat. it's got a 40 yamaha with a pump on it, zippy little rig for the rivers.
i've also got a 13' alaskan that i bought 9 years ago. best $800 i've ever spent! i've fished all kinds of lakes, puget sound, chehalis river and the strait out of that thing.