I have a Dominator and it is well worth the price. However, if you'd rather not spend that much just get yourself a Camillus Heat instead. The Heat is the same design built with less expensive materials (440A vs S30V and FRN vs titanium). It is still a very good knife.
I think that both versions of the design have significant advantages over the Blur for SD purposes. The flipper not only makes for faster deployment, it forms an effective lower guard when opened. That means there is a "hard stop" between your hand and the blade.
I think it's dangerous to rely on surface friction or gentle curves to keep your hand from sliding under hard use. Stabbing exerts a tremendous amount of force. I want a surface perpendicular to the grip in front of my hand. It can be in the form of a lower guard or a deep finger indent, but I want something solid up there. Knives like the Dominator and Heat (along with many others) provide that security.
--Bob Q