Pa50sd but also got a Tyros 4 recently. The pa700 is a great instrument and a big stepup from the pa50sd. Like any korg it takes a while to get used to it. And as Ive been told it has the same engine ad the pa4x alot of the resources are compatable.
Gem Wk4, Solton Ms60, Technics Kn5000, Korg Pa50sd, Yamaha Psr k1, Tyros 4, Korg Pa700