Honestly, and not to sound like I'm trying to sell you something, but we never did like the timing curves in the VA box. Even the original EZ was too much for our liking with injectors, so we built the True Torque Program (reprogrammed EZ Edge box) which offers better power, performance, mileage and has the boost module built in.
If you wanted to just add a boost module, by themselves they run $300, so bang-for-the-buck would be to swap your VA for a TTPM box.