Hello Tim
If you follow the advice of Tapas you will certainly have a good combination, however one thing I would suggest, is that you follow the Organ convention of keyboard layout, (And which has been proven to work over hundreds of years) which means have the Triton on top for the Solo work, and the PSR on the lower for the backing.
By the way the beauty of Midi is you don’t have to have instruments from the same manufacture to work together.

Bill