I'd go with the VTF3 over the 2 if you can afford them. Buy once, cry once, as they say, and you'll be sure to have enough bass on tap.
I would rethink your sub positioning though, generally it'll be likely to sound better with one sub in front and one in the back on the other side.
I would rethink your sub positioning though, generally it'll be likely to sound better with one sub in front and one in the back on the other side.