The PSR3000 is a discontinued product, however i really like that one, i haven't try the s700 yet, i would say.. if you can get a very goood price for teh psr3000 beating the s700 go for the psr3000, it is just great and have many features that the s700 have.
If you don't care about the price or find both for the same price i would buy the s700 for the new technology, besides new voices developed by yamaha.
