Ohhh....
But for a few upgraded bits, like the carbon brakes and redesigned wing and the increased thrust engines, the B747-300 Series was easily the best model B747 Boeing made!
If it had been in production a little longer, the -300 would have indeed had all these improvements, but the -400 became available, and Boeing was having trouble getting initial sales going with the automated flight deck and no Flight Engineer, so they ceased production of the -300, to force the issue!
A bad decision, as it has turned out!
Hey "conch", you didn't mention the most uncomfortable seats of any B747 model, in your -400 list!
Cheers