Can you good folks steer me right for a xmas purchase.

My 16 year old son has been playing keyboards on an old Yamaha PRS 170 - 61 key keyboard for the past couple years. When I bought it I felt is was little more than a toy (I still think this). Wife and I are very impressed by what he has taught himself to play on it, but been dissappoint that we could never convince him to take lessons. He always said if he took lessons it would spoil the fun. By the way, he is a good trumpet player in school bands for all his years. So Mom feels no lessons, no new keyboard! Dad feels differently!

Assuming I can get my way. What would be a GREAT buy to step up a notch at this time. I feel: He needs more keys, he needs weighted keys, he needs better piano sound. Maybe in the ~$500 price range?? Help guys I am counting on you taking my side here and providing a link to a offer to good to pass up so I can convince wify..

Dad