I settled on a 12 myself because of all the available parts, I could be wrong but I think they made "some" changes in 14 before the switchover, so if your going with a nbs stick with a 13, a lot of parts are available for 10-13, some specify 14 but many do not. and then there is a also a "early 15" as they made a change mid year so that is all just a big mess to avoid. if you really want a 15+ make sure it is after the mid year change I don't remember the month but I am sure someone here does. whatever you get a buy a warranty...... mine has paid off rather well, lol.
