Now been "a while" since this thread was started and I wonder what the OP decided? As he hasn't said anything I wonder if he did not survive a meeting with 1000V. Hopefully not.All are fair points. I think I should try to listen to some 845 and other tubes before I jump into this long and dangerous process.
If kinku is still interested in an 845 amp, the Sun Valley 845 amp Sun Valley Audio (Japan) - - vkung - VK music - Sunvalley Audio Forum may be just what he is looking for. Purchasing as an assembled amp will cost something less than an additional $300.