For the money you have set aside for a new player, were you to reinvest this in the 880, you'd be set for another good stint with it. It may even benefit from a new clock and alternative output stage.
Aside from that, for the money (+US$99), I'd look into the Schiit Bifrost Multibit DAC. If you listed your 880 on the AA for sale, you'd probably get some decent money for it which you could use toward a newer device. Newer it would be. Better? Not sure about that! :^)
Big J
"... only a very few individuals understand as yet that personal salvation is a contradiction in terms."
