Buy the Model 67 but keep
the Model 15. Figure out
what else to sell.
They are handy and will get the
job done as far as self defense.
Having two never hurts, i.e.
a backup in case one needs a
bit of repair.
As to the 586 in 6 inches, a big
clunker you'll tire from carrying
if at all.
I expect many will disagree with
me on some or all points.