FWIW, I have owned my M300's for several years now. Early on, I had a noisy transformer. Wilson now has a power supply upgrade which includes new transformers and a bunch of other improvements. After completing the upgrade, Wilson delivered the amps directly to my house, stayed and listened a bit and provided some set-up suggestions. That was almost two years ago and the amps have operated flawlessly since.
They are said to be quite overbuilt, even considering they put out 300wpc into Class A bias. The power storage capacity and other specs are amazing. The amps also double that power into 4 ohms. They are one of the best thought out products I have owned and include things like a low bias switch to keep heat down when not listening critically (or to use as a sort of warm up mode), power on lights that indicate when the amps are turned on and also which bias mode the amps are in, another power light in the back to help prevent operator error by moving cables when the amps are turned on, fuse access from the back, bumpers so they are not moved too close to a wall which can damage the attached cables, first rate binding posts, and excellent shipping boxes with detailed packing instructions since the amps are about 90 pounds each. All I can say is I am very happy with both the sound and operation of mine, and the amount of power on tap allows virtually any speaker possibility you would consider.
Having said all that in favor of the Claytons, I suggest you do yourself a favor and go listen to as many different amps as you can that are both in your price range and which supply the necessary power for your speakers.
