Some of stuff in the Master Pro is of good quality. For no good reason I find myself intrigued by the knife they sell (mostly because I'm just a knife nerd in general). At first blush it doesn't really look much more capable than the RSK Mk6 although it's twice the price.

I think Jeanette's list includes some very good stuff. If we're talking kits sold by the designer- and not a committee of marketing folks like the SOL stuff- then I don't know of an awful lot. Personally I like to design my own kits for the area where I will be using them. But very often the kernel of the kit that I build on is a Ritter PSP. It's just too good a value to omit!