mdwsta4
Matty Westside
For leather straps, I find it hard to beat Cub & Co. From the design, to the materials and construction, to the owner, they're top notch. I've had a few different versions of their products and love them all!
custom strap length without pad
standard length with pad
custom strap length without pad
standard length with pad
rybolt
Well-known
Gordy's with the pad for cameras that are heavier. Without the pad for fixed lens cameras like the RX1.
uhoh7
Veteran
Love the reviews are variety of suggestions 
Barton 1972:
M9 CV 35/1.4 by unoh7, on Flickr
Barton by unoh7, on Flickr
Barton 1972:
M9 CV 35/1.4 by unoh7, on FlickrBarton by unoh7, on Flickr
robert blu
quiet photographer
Gordy's here on my Bessa
PaulDalex
Dilettante artist
Another vote for Luigi.
Not only his straps are beautiful, but are built in such a way that it is impossible that they may scratch the camera. Either no metal parts at all or protected metal parts.
A must for me
Cheers
Paolo
Not only his straps are beautiful, but are built in such a way that it is impossible that they may scratch the camera. Either no metal parts at all or protected metal parts.
A must for me
Cheers
Paolo
Monz
Monz
I have 3 Luigi straps; 2 for Leica Ms and one for a Rolleiflex. All are excellent. I also have and like the braided Barton strap (which is not adjustable).