I play almost solely Predator now - BK 3, Air Jump, Z2 shaft and even my case - so I guess I'm a fan. I don't notice that much difference between LD shafts as long as you are talking about the same taper, diameter and tips. I'm very happy with the Z2 on my Ariel Carmeli butt. OB shafts are my second choice and it would be a toss up except for the deal with break speed.
As for the BK3 - I had a BK 2 for years and _really_ liked it. When the BK3 came out I "upgraded" and found I had more problems with miscues. My break is pretty wild and out there so an occasional miscue has always been an issue. After putting a bit of focus on it I'm breaking well with the BK3 and am happy to have it. I think the BK 3 is better but you have to play better to make it worthwhile as it is not as forgiving.
Recently I let a friend try the BK3, he is more focused than I am and he still has a BK 2 - and he immediately fell in love with it.