There is no doubt that HD is a beautiful classic looking bike..
The problems are one the initial cost and two the basic maintenance cost. My experience and those of my friends proved to me at least that before you hit 30k miles it will be in the shop for repairs costing well into a thousand plus $$.
The HD will hold it's value better providing you don't put many miles on it but then your back to looks over riding.
So if you want a looker the HD is a great bike but if you want to "ride" care free miles the F6 is the better choice. The looks are a bit more modern and the performance is unmatched.