serious box builders

hey guys need some help here, ive built a box for my 2 12's its 3.5cubes with 2 ports 4" x 12" long, subs are facing my back seats ports are firing up to my rear deck full plexi glass window in the back, now it sounds great, but i think it can sound better and i want to design a new wild looking box, i just need some help designing one, dont hate cause i have audiobahn subs...lol, and lots of plexi, and im thinking slot port or round port firing frontwards, maybe subs mounted upside down etc, be creative dont want a square box i wanna show off my subs, lemme know what ya think pm me or reply on here, maybe we can work something out