I just got the adjustable suspension seats put out by Smittybilt. They look just like the Mastercraft ones but at less than 1/2 the price (I actually got mine for $195 each OTD).
Anyway, I have never had anything other than stock seats before, so I really don;t have much to compare to, but I have to say, these seats are crazy comfortable and they look great.
Yes ZJ seats will work. I love junkyard parts, I just hesitate with interior stuff, as I imagine some cigarette-smelling, dog-hair covered, laid some heffer on it seats that i'm dropping my french-fries on while i'm driving. It's probably just me being a wuss. I'm sure lots of people have gotten great seats out of the junkyard.
Good luck!
P.S. you can have my old seats if you want them (shipped on your dime). They're maroon and in great shape and i'm married so you can bet nobody's been laid on them in a looooong time!