why don't you have the B29 included with your bombers? it played a great roll in WW2 and it was the plane that dropped the first atomic bomb. 
I am sure you have worked out this is a well worn groove and ideally we would have every plane including the French ones in the game it is a question of priorities.
Actually though I think the B29 would be very popular and equally annoying flying so high and fast it would be very hard to shoot down and ideal for the furball and HQ killers.
I would perk it higher than the 234.