Yamaha is certainly a reputable brand. I still have my digital piano (a Clavinova). It's still in near mint condition after 10 years. I can't say much for the keyboard itself, but I know I'd recommend Yamaha any day.
Two years is nothing for a keyboard. Pianos seem to have more of an investment feel - something that you purchase because you can see yourself playing it 10 years from now - than guitars do in my opinion.
To quote a great man, "If it sounds good, it is good."
_________________________
I love science, and it pains me to think that so many are terrified of the subject or feel that choosing it means you cannot also choose compassion, or the arts, or be awed by nature. Science is not meant to cure us of mystery, but to reinvent and reinvigorate it. -R. Sapolsky
Upton Bass Custom 3/4 Upright, BSX Custom Allegro EUB, '80s Peavey T-40, MIM Active Jazz Bass, Godin BG-5 (for sale!), Fender Bassman 100 , `68 Fender Bassman 50 head, SWR Goliath 4x10, Markbass 2x10 cab