I do THAT a lot. I have come to the conclusion that I sound best on Ketron, Roland, Korg, Yamaha, in that order. The difference between Ketron and Roland is not that much, nor is the difference between Roland and Korg.
Right now Korg seems to have the total package I like best, taking into consideration sound, weight, controls, ease of operation and vocal processing. There are trade-offs in every category between every brand.
Hammer is bringing his BK 9 for me to play with in the next few days. I expect to like it. I expect to not like it as well as PA3X. We'll see!