Tuffy Security Products Security Deck Enclosure for 07-10 Jeep® Wrangler & Wrangler Unlimited JK -- After searching, this seems to be the best secure trunk for a 4-door JK. I liked the bestop flex a trunk. But the reviews for it are terrible. This one doesn't look like it but its still easy to remove for large items. And secure otherwise. Also, it can hold 200lbs on top of it so no need for an extra carrier on top.