Solid State Amplification for Devore Nines?

I know nothing about Devore Nines--can't find them in Devore's site--but if their sensitivity is in the range of 85 - 90dB, I strongly recommend a pair of McCormack DNA-750s...$4995 new, delivered to you from Spearit Sound.
http://www.spearitsound.com/product.cgi?group=708&product=2403

These are highly musical and resolved but NEVER harsh in the highs. Read Peter Moncrieff's review of the predecessor DNA-500 stereo amp...
http://www.iar-80.com/page5.html

All the good things the '500 is, the '750s are at least as good and maybe a little better. When I was considering these and a used c-j Premier 350, I talked to c-j's Lew Johnson. He said that the DNA-750s were the best-sounding amps ever to wear the McCormack brand and that the P350 is the best-sounding solidstate amp ever to wear the c-j brand.

Driving my V-steen 5As, the sound is effortless, musical, natural. My system has never sounded better, and I love the sounds of the '750s so much, I bought a McC DNA-HT5 to replace a bunch of old Marantz MA500s driving center and surround speakers.

Buy a pair--you won't be sorry.
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I used my Nagra PSA with my former Silverbacks, and demoed the Nines with the PSA as well. A very musical pairing with the Silverbacks and Nines IMHO. You should be able to pick up a used PSA in excellent condition for $5K or less.

Try a Sanders Magtech.