I have been very happy with my 515's for a while now, but I wanted to try a few other styles so the 529s seemed to be the safest bet.  I did what others suggested, and ordered one size down.  They do fit a lot like the 515's the first time you put them on, but with a wash or two they shrink.  So, after washings the rise becomes shorter which causes the belly to poke out.  Also, they shrink in the length so they don't fit over my boots now they way they should.  I won't be buying these jeans again.  I'll stick with the 515's when I buy Levi's. I generally wear a 14 L and bought the 12 L it was the right decision for these jeans for the waist size, not so much for the rise and the length.