BraveHeart,
Let me give you different perspective. I strongly recommend Yamaha but I urge you to pay more money for better yamaha keyboard.
For example, if you buy PSR740, in addition to getting large subset of motif(yamaha flag synth) voices, you will get the styles which will help you learn how to play and can be a stepping stone for your growth.
I do not recommend a synth for a beginner student even on my worst enemy.