Disclaimer: I am a Wolcott owner and use them to drive Magnepan 3.6Rs. I had an opportunity to listen to them before purchasing them with a pair of WATT/Puppies. To me it was a dissappointing combination. Jtinn's use of the word "diffuse" pretty much sums up my impressions with the Wilsons. Henry Wolcott voices his amps with an eye for them to drive the Soundlab and Magnepan panel loudspeakers.
As to their reliability - they are very well built, and use the EL34 tube. They also have an auto-bias feature that biases all eight tubes each time the amp is powered up, then takes itself out of the circuit. This keeps your tubes at optimum and also allows you to replace tubes as needed, without having to replace with matched sets (unless of course you want to). The Wolcott amps are capable of producing lots of current and prodigious bass, even with difficult loads like the Magnepan.
While I would not claim to speak of the synergy the wolcott would have with the Genesis line, never having heard it, I was not overwhelmed with the Wilson pairing. Most Wolcott users are panel speaker owners. Before investing (a new pair ain't cheap), I would try to get the amps into YOUR room, with YOUR speakers.