I like the San Mai, but it's nothing amazing. Considering that my voyager that I live by has the same steel as the core of the San Mai I can not see spending the money, even as a dealer, on any of the custom series. I've sold a few to people that want a showy mantle piece, but thats it. Most people will tell you to stick to a VG, S30V, of even an AUS blade. You get the same out of it, and they are far cheaper.
also, i've noticed that the simple designs from Cold Steel are great. I love the voyagers and ti-lites, but the more complex ones (AK-47, Recon) always screw up. The san mai ones are great in design, but again, they have too much put into them and tend to not hold up to the abuse that the cheaper ones will.