If you plan to use it a lot, or see yourself using it often into the future, make it easy to upgrade and a non-reversible hack. Classics aren't exactly rare, and the front bezel is just asking to be widened to easily accept a slot-load BD drive. It will look a lot cleaner without a myriad of cables snaking around the back of the case, and in the end you'll be much happier with a properly done mod that looks more professional.