pros and cons of ported vs sealed?

I have 2 Rockford power 2 ohm dvc 12 subs , they are 2000 watts max and 1000 rms a each. should I port them or leave them sealed?

With an EBP of 68, you should vent the box for these speakers.  You should probably look at this recommended model and customize the size of your box to accomodate two subs. One easy way is to build a two-chambered box so that each sub has its own port.  It would look like the box as pictured in the link for the left side sub, and the right chamber would be a mirror image of the left.  Big box.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.