As far as the seats go, it depends on what yer gonna use the boat for...since mine gets used for fishing and family boatin', I like the flexibility of the two Captain's Chairs you see in the pictures above, plus two folding padded chairs like this
West just ran the SS chairs on special for $99 apiece...the aluminums work well too...if you go this route, keep 'em outta the sun when not in use and they'll last a good long time...