Off topic somewhat, but I've always thought Boeing made a huge mistake in killing the 757 program. It's as versatile an airplane as any around -- capable of transatlantic, long haul and short haul high density domestic and able to use airports like SNA and DCA. For a 30-year-old design, it's proven its worth. I never understood why Boeing didn't simply come up with a more fuel efficient 757NG with a bit of structural lightening using composites and upgrading the avionics to something along the lines of the 764.
And, yes, the left turn to F is a nice touch in the design...
I do agree the 757 does have a smart design and different capabilities.
I'm sure DL was considering the A321 when making the decision but I don't believe they will go for the A321 in the near future (if they will get it, it would be a replacement for the remainder of the 757 fleet)