i used to own a yamaha 62.
i upgraded after my grade 5 i think, and tht was roughly 4 or 5 years ago.
last year however, i realized how bad my sax was compared to my friends selmer series 2.
the low notes would hardly speak at all unless i put alot of air down the intrument, meaning i wldnt b able to play anything below a D quietly.
So i then upraded again to a keilwerth shadow, which is (in my opinion) definately worth the price.
but as u say, u dont want to go over the price of a 62.
Im not sure, but i think theres a newer version of a 62 or something. So i suggest go to a music shop and try different saxes out.
YAnigasawa is also good brand, so check them out aswell.
A good website is www.sax.co.uk
Good luck!
John