I recently went on a strap frenzy looking for perfection.
Honestly, this one was it for me:
http://accessories.musiciansfriend.c...ap-?sku=364977
Awesome strap for $17.
First, it's padded which is what you want to help with the weight.
It's also 3" wide, also important to distribute the weight.
Not sure if length is important, but this is one of the few I found that would go to 63"
What put this strap over the top for me was the leather (pleather?) on the underside. I thought it would either be grabby where it would pull my shirt off, or be slick where it would allow a neck heavy bass to dive. Nope. It's perfect. It just stays where you put it. You can slide if you want, but it doesn't pull your shirt. But if you let go, it holds on just enough so the bass won't dive.
Now I can see this strap probably falling apart in a few years, but big deal. For $17 I'll stock up. I can get 5 of these for the price of one Levy's.
But if you want one to last forever and don't mind paying for it, the Levy's padded straps are nice. Real nice.
http://www.levysleathers.com/product...r-Straps-MSS90