Hi Papaslim, Thanks for the question!
I would stick with the VVX-10v3's and when you are ready; I'd recommend the upgrade to the RP-3500.1D on the existing subwoofer setup. Having proper space for the (3) 10's and increasing the power (which they can handle!), you will notice the results better than potentially choking (2) EVL-15's with improper air space. Please feel free to drop back in and let us know how the build is going, thanks for running Skar Audio!
-Kevin S.