I'm playing two killer halfstacks and I'm switching speaker cabinets between them so I'm playing the Marshall amp through the Hiwatt cab and the Hiwatt amp through the Marshall cab.
Gear:
1976 Marshall JMP Super Lead
1976 Hiwatt DR103
1971 Marshall 1960B cab with '73 T1221 (close mic), '67 T1217, '71 T1281 and '68 T1221
1970 Marshall 1960B with 2X '73 Fane Crescendos
1973 Gibson Les Paul Custom Cherry with a '77 Super Distortion in the bridge.
close mic: 548
room mic: C414
hallway nic: Beta57A
Mic preamp: API3124+
Fryette Power Station 2