Don't get me wrong...these two subs sound really fantastic, deep, and much more even which is what I was looking for. However, I clearly got used to the impact I had with the SPL-1500r in the corner.
The only other thing I can think of to do would to add an Velo SMS-1 (which I was going to do anyways) which outputs to three subs and then drop a SVS tube in the corner for that low end gut feeling....
The only issues that come to mind with this is the tuning and musicality of the subs matching....