Re: What is your "holy grail" amp?
My best amp is something I built myself, completely from scratch. It's basically a Matchless DC30 clone with a valve effects loop and tremolo. I built the chasis and the woodwork. The transformers are torroidal to keep the weight down, as i have a bad back. All the internal compnents are high quality, paper-in-oil caps and such, wired point-to-point. The back panel features 4,8 and 16 Ohm output sockets and the sockets for the loop. It also features a standby switch and triode/pentode switch for each pair of EL84s, giving maximum versatility. The front panel features send and return level controls for the loop, and speed and depth for the tremolo.
One channel features an EF86 preamp with a six-way rotary tone selector (as was used in the original Vox AC15s), and the other channel is the Vox top-boost channel from the AC30. I pulled a trick to get the two channels in phase with one another to allow jumping the channels without using external devices, just a short cable. Rectification is done by a GZ34.
It's lightweight and it can do almost anything. It's power output can be switched to various levels via the standby and triode/pentode switches, although i've found i prefer the tone of all four power valves in pentode (a la AC30) at any volume. It can be useful to limit the output sometimes though.
I gave this amp a lot of thought before spec'ing the transformers and having them built, and before any construction began. I've built it for maximum serviceability/modding and it's a joy to work on. It's been rock solid in it's performance, and it just gives up fantastic tone with almost no effort. The time and money I spent has been well worth the result. Without a doubt the best amp I've ever had at any price.