>I would agree with the Tiger's 8.8cm. Even though the Tiger itself wasn't common, the Flak 18 and Flak 36 gun carriages were. Those were a bitch to move around, but IIRC the later 7.5cm Pak 40 AT guns weren't much easier to move either. From start to end, it had a stalwart record and was useful for everything. Anti-tank, anti-fortification, anti-aircraft. It just worked.