If your concerned about $$$$ stay with the proven 6.2 and 6 speed. The 7.3 and 10 speed is about a $2K option. Even though the 7.3 seems to be a good engine its still only 1 year old. It takes awhile to work out the bugs in any new engine. Some defects will not show them self for many thousands of miles.

My biggest fear is when I die my wife will sell my guns for what I told her they cost.