Solid State to replace Audio Research REF110?

Again, I would recommend researching the following depending on your speakers impedance and recommended amplification/power, and of course, your wallet.

First Watt SIT-1 Monoblocks
Wells Audio Innamorata Amplifiers
Pass Labs XA.5 Series
Merrill Audio Veritas Twin or Monoblocks

Thanks for the answers.

I pair the REF110 with an audio research REF 3, I have owned this unit from 2005 without problems, after 9 years with audio research tube power amps I have suffered 3 crashes: in 2005 with a VT100 MKIII, in 2008 with this REF110 and now with the same unit (and the same left channel which PCB was replaced in 2008).
In the 2 first failures I could change the PCB applying warranty, now I will have repair it. I think I will have to replace 2 resistors and 1 tube socket.

My speakers are Proac D38, 4 ohm, 90 db sensitivity.
 

Maybe it's just me, but if I had three very expensive amps from the same company require expensive repair as a consequence of an unavoidable and unpredictable aging process (output tube failures, like light bulb failures, are inevitable), I'd think long and hard before I bought another. Especially after reading about how non-user friendly tube replacement and re-biasing can be. Just my $0.02.

I must say, I find these concerns re ARC reliability and matching Pre amps, a concern. I have just bought a Ref 75 and am matching it with what is effectively, a Music First Baby reference, though it is a clone. I have to say I am very happy with the result. The dealer bought a Ref 3 ARC pre when he set up the amp and on a very brief audition, I preferered my passive Pre.

I used the Passive because HiFi+ back a few years ago, liked the Ref 75 with Music First, but as someone has said, reviewrs do'nt keep amps long enough to judge reliabilty.

Berning Quadrature: very reliable, maintenance free.