I would keep the wing on if you don't have the holes filled. When mine was wingless, nothing would piss me off more than when people have to point out the holes, and ask why there's holes or if water got in the trunk, like I didn't notice. Done venting.
I've always liked the 94-95 cobra wings on that bodystyle. You can probably find a used one on craigslist or ebay for cheap.