Clearly the old hand wired Fender Twins are one of the best guitar amps ever made and possibly THE BEST guitar amp ever made. Its 40+ years since they first made the blackface models, and they are still among the most sought after amps out there. And despite their age, there are still a relatively large amount of them out there. I have no idea how many of them they made (blackfaces, silverfaces, 135 Watt Master volume models), ,but it must have been a heck of a lot, since there are still many out there. They may be pricey, but not rare.
I recently almost bought a 135 Watt twin on CL for $525. I have a 64 blackface with Altec 416 speakers and this amp is just heavy as SH*T. Sounds Great though!
I recommend if you do not have a Fender Twin, that you get one. My philosophy, good enough for Jerry, good enough for me.
The twins have two age old problems, their weight and the fact that they are loud. If you can haul them, you can probably turn down the volume control.
I have a Mesa 50 caliber combo amp that I think has a great clean channel. I have seen a couple of these go recently on ebay for about $425-450. I think that these work great, sound great and are pretty loud and 1/2 the weight of a twin.
You just can't go wrong with a twin, just ask Jerry!