2nded, or look into trading it in as a DP for a Z/28 in two years (or less). Depending on what you've done to it the dealer may find reason to mark the piss out of the car as a one off and in turn give you some leverage in the negotiations.
Caymans and 911s are nice, but having done a side by side with my 4th gen I'd take my car on just a blind pick of the two. And it's a 4th gen. The benefits of parking in the 'members only' spots at the course to avoid bird poo.
Seriously, with the Z/28 99.99% confirmed just hold on to it. They say cars make horrible investments but at least you'd possibly have a leg up in trade over a stock SS.