I play the Nord Stage EX at my churches. I love that thing to death! I had a triton and a motif and it blows then both away in the piano and organ section. The synth isn't bad at all, but there are better things. I would get the nord and look into a midi device if your really hurting for the strings.
People almost hate me for getting such incredible organ and piano sounds out of my keyboard. I love the Rhodes and effects section as well. My friends are selling their Yama's and Korgs for Nords now that they've heard mine
GET A NORD!