Fi.Q enclosure size and amp pairing recommendation

So I am trying to decide on which Fi.Q I want... Either the 10 or the 12. 

My plan is to build a custom sealed enclosure to sit in between the second row captains chairs in my Tahoe, and the sub will down fire. I am leaning more toward the 10 because of space constraints... the maximum size enclosure I can fit in there is 27" L X 14" W X 10" H... So would y'all recommend the 10 or 12 with that, and what cubic footage for the enclosure?

Also, What amps would pair well with the Fi? I listen to some rap, but mainly mashups, EDM, and lots of rock/country (basically everything hahaha)

Side question... I don't know if any of y'all have a Tahoe with the Bose upgraded sound, but would I need to remove the stock 6" Bose sub in order to run the Fi (or any other sub for that matter)? I am afraid the Bose will fire before the other sub and it will sound off... opinions?

Thanks!

I will also be using the Pioneer AVH-X8500BHS head unit once I receive it... which will most likely be before I get the sub in

Edited March 19, 201312 yr by TexaBama