What's a good upgrade from a Krell 300cd cd player

I'm wondering if the 300CD might be a weak link in my system. It's musical, not strident, has a wealth of detail across the frequency spectrum, exemplary PRaT and good soundstaging (or at least as good as I can get in my highly reflective room).

All in all, I'm very happy with it, but I'm curious to hear from anyone who's owned the 300CD and moved on to something better. What took it's place, and what were the improvements?