I sent mine to Railcar. No complaints. In the past I used a local seamstress for another pair of SLs and the stitching was pretty crooked/sloppy (and no chain stitch on the hem if you care about that), though maybe you'd have better luck.
I think the 512 is the replacement for the 522 @gettoasty.To add one more contender: 3Sixteen also has a higher rise tapered cut now.http://www.3sixteen.com/collections/denim/products/ct-220x-classic-tapered-double-black
I think I'm going no case with the 7.
Now that screens are just $29 to replace and water resistance is improved, and since I went with the less scratch prone matte black, I'm willing to take the gamble.