These threads are always the same, with people talking like they know sh*t like odds, what thieves, want, what works, and what's best, none of which they do, of course.
The main issue, as I see it, is that you've got a nice bike, that you enjoy using, and you want to keep it safe without bolting on an ugly, clunky to use, bulky lock that's wholly inappropriate to the approach you take to every other aspect of the bike.
The answer is the TiGr lock, a lightweight Ti bow that discreetly and securely straps to the bike, and depending on the model and size, can do full capture (wheels & frame) and provide very good security.
I have three, and the icing on the cake is that it's a lock that starts conversations; bike geeks ask what it is, and everyone thinks it's cool and neat. On the toptube of a naked Ti frame, a TiGr would virtually disappear.
Elegant Bike Security - TiGr Lock