How are you doing on Vidaza?
It doesn't sound like your situation is too "advanced" for transplant, but if you are doing well on Vidaza it seems like that is a better solution as long as it keeps you stable. Having 3 unrelated donors available is very promising, but--as I'm sure you know--the risks of transplant at any age have to be considered very carefully. If if comes to the point that you are considering a transplant, I would very definitely recommend getting multiple opinions from centers that have experience transplanting patients with MDS. You can get detailed information about transplant centers from the National Marrow Donor Program