I have the Auburn Pro Series in my car and it works well. But it is not rebuildable. The Power Lok clutch type sure grip, which is rebuildable, is now being reproduced and can be had on ebay for about $339. The Power Lok was not being reproduced at the time I had my rear done that is why I went with the Auburn.
Yukon makes the most reliable Power Loc unit. Don't know who's making the ones on e-bag. I believe Yukon is a re-pop of the original Dana Power Loc. But, anything is better than a one hopper.