Help with picking what sub/size of subs to buy

[Gradyj14 10+ year member]

So I cant decide what I have enough room for. The MAX dimensions that will fit in my trunk of my BMW 528i are: 18" Depth x 32" Length x 14" Height. It comes out to be 4.66 ft^3 before the thickness of the wood and all other displacements are taken out.. I was wanting to stick with AudioQue Subs. So i was hoping maybe it was a enough room for two SDC2.5 10's, or maybe one HDC312-A Aluminum? What would be my best bet for over all daily driver? Thanks

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