I think the Doc Marten line has long been delagated to 'Hot Topic', in the sense of a marketable commodity being assigned to an obvious target demographic, with the typical declines in quality. The last pair I had lasted about 9 months. I have seen some Cat boots that may have been OK, but I think they are going the way of the Docs...i.e. plaster a plastic CAT emblem on them, have preteens in China sew them up, and sell them at Wal-Mart...
These Whites look better and better. The rebuilds are what might rope me in...my job is pretty rough on the footwear. Here's what I'm looking at:
http://www.whitesoutdoor.com/store/product.php?category=Boots&id=700
Damned expensive, but I'm willing to go to the food bank for a week or two to have some real leather on my foot. That hardtoe that isn't metal is the seller...steeltoes are rumored to be dangerous when working with larger lighting rigs (lots of current, cabling, and highly conductive truss/etc around).