If you have a sub with variable XO points slopes, then integrating with ported array may not be too difficult. If you are using a typical 12db/oct fixed subwoofer XO, then matching the more gentle rolloff of a sealed array is likely to be much easier and it may even end up that the 60hz XO point works.
Also, if you go sealed and leave the back panel for last, then you can try it as my favorite, an OB line array.
If you do go ported, then you do have the option of adding some resistance in the ports like GM suggested. That will give you more extension than sealed and improves the group delay over ported, which is likely to help with sub integration. Plus you can always plug the ports later.
Personally, I like to take the easy route. Plus I think the 60-90hz range is very important for bass SQ, so I'd avoid causing group delay in that range if at all possible. GM is one of the very experienced people here who gives really sound advice, so if you do go ported, plan on going aperiodic for best results.