'06 was first year with sweet cheeks and molded seat,
I think they switched backbands to the cleat system in the '05 boats. So if you want an older model Jackson with all the imporved outfitting, get an '06 or call Jackson and they'll sell you an upgrade kit for something like $150 or $200. The '07 hulls are noticeably different than the "classic" hulls and for the Allstar-series boats, a pretty decent improvement imo. Haven't paddled a '07 fun series enough to really tell.
"It's All Good"