Two Wetsounds XXX enclosure plan.... opinions?

I have an '08 MC x2 I plan on putting these two subs in. I have a Soundqubed Q1-2200D. It is rated at 2200 x1 at one ohm so I think it will power two Wetsounds XXX subs nicely paralleled into a one ohm load.

I plan on using the dual vented enclosure from Wetsounds website which are 20x20x15.25. I would like to make two of these boxes butted up together in the passenger side compartment under the seat. Both boxes facing the hull?? sitting on their shortest side so that it will be a total of 30.5 inches in depth and 20 inches tall. These will barely fit but they will fit. Anyone see any issues with this design? I don't think there will be any noise canceling have the two subs next to each other will there? As long as they are both phased correctly.

I'd like to hear everyone's thoughts on this plan as construction of the boxes will begin really soon hopefully to complete the project by Memorial Day!