Note on Heavy Bombers:  We play with a house rule that you still count BOTH dice as hits or for SBR damage.  I think it is totally ridiculous to let them roll 2 dice but only count one of them as a hit.  Heavy bombers are just that, HEAVY.  They carry a much larger bomb load and thus create more damage – i.e. 2 hits against combat units or 2 dice rolls worth of damage in SBRs (+2).  Now, the 3 dice given to Heavy Bombers in Classic was a bit excessive.  Boy you could really rack up some damage with those.  I think 2 dice is good enough though.
By the way, this is not totally unfair to the defender either.  After all, you are still rolling dice which depends on luck.  In combat, you could very well end up rolling two 6s – No hits for heavy bombers.  In an SBR, it’s entirely possible that you roll snake-eyes – A whole 4 points of damage from you mighty heavy bomber.
Rolling 2 dice and choosing the best one isn’t Heavy bombing, it’s more like Precision bombing.