Fanx Dood (BTW good to speak again!),
Your point about depth is my major concern however the PF500 is 3" deep (according to Ampeg) and a 2U SVT 3-PRO is 3.5" deep..... now I know that the ladies on here say that that 1/2" makes all the difference, but my guess is, that as I want to change the Eminence ceramic for a Neo Celestion it will open up more space......
I will read the review when its out as I really like this idea and, will if I need get one of the class D PFs but would like it to be stand alone with the valve preamp rather than run a pedal (which I do with my current practice set up..)