King 2b or 3bf? Can’t decide😩

I’ve been playing very high and very loud at weddings lately and felt that my Bach 42B is no longer up for the task.
I want to buy a smaller easier playing trombone and can’t decide between the king 2B in King 3BF.
I would get the 2B, but I feel I would miss the F attachment.
Does the king 3 bf have that much more assistance in the extreme height register?