you're doing pretty well at 235 and 15% bodyfat. There are a few different routes you could take. I'd check out Berardis Precision Nutrition series and his newest article on G-Flux.
Also, check out Dr. Lowery's Temporal Nutrition and CT's Carb Cycling Codex. You're within striking distance of being pretty lean, so at this point, I'd say just take the time to get in the 10-12% bodyfat range. Once you get there, with all the strategies given in the articles I listed, you don't have to balloon up just to put on LBM.
Granted, you'll gain some bodyfat in a bulking phase, but if you give yourself a reasonable cut off point, like 15-16%, you'll always be relatively lean, and it won't take you forever to get pretty shredded either.
Also, I'd recommend trying Max Strength HOT-ROX, as it will definitely give you a boost. Do you know what kind of training split you'll be using yet? Good luck with your goals.