I used 6th in my Challenger every single day. And my calc's say with my 25.7" tire and 3.55 gears I will be running virtually the same RPM's across the board (your results may vary), and with a 5.7 Hemi it should pretty much run the same.
But, everywhere I go I have to spend 30 minutes or more at 60+ mph which greatly influences my desire for a good OD trans. If I was someplace where most of my driving was on city streets, I doubt I would care or even want OD.
