With a Krell amp, I'd lean toward just using RCAs now that Naim (finally) joined the real world (yeah, I know, it was a while ago, but my first Naim was back in 1984).
It's always easy to spend someone else's money, right? That said, if you can, try the Krell DVD - $500 sounds pretty reasonable if it is working properly - and watch for a S350a or a CD5x/xs. I have a Naim DVD5 and an Exposure 3010S2 CD player; the Exposure is audibly "better" but the Naim is still excellent.
And definitely try the Naim speaker cable with the Krell - I heard a KST100 with NACA5 once and it worked very well.
Enjoy!