Do you plan on off-roading? I would think 265 hp is more than adequate. By adding a better cat-back exhaust, K&N FIPk you will probably see another 15-20 hp. While the new engine is based on the Z engine, it is tailored for the X and is intended to be used differently. Concentrating on suspension, tire, and other similar upgrades will be easier on the wallet and will be more useable.