...I used two amps at the same time.
JCM800 + Marshall 4x12 set fairly trebly...
Orange Dual Terror (TT Channel) + Orange 4x12 set a bit thicker...
Gain set to around 7/8 on each amp.
Cor! It sounded lovely, highly recommended. More weight and definition to the single notes, weirdly, I found I didn't need to use any sort of OD for leads either.
EDIT:: Anyone else use this sort of set-up?
Paddy