The brands I've owned the most have been Spyderco and Victorinox. I'm in the process of getting rid of most of my Spydercos; they're cool knives, but, for whatever reason, just don't quite live up to what I'm looking for. After I got my first Sebenza, that kinda ruined things for me with most other blades. I've read posts where people say "buying a Sebenza will actually save me money, because now I won't be buying all those other knives". In my case, though, buying a Sebenza has made me want to ... buy more Sebenzas! Not exactly a money-saving proposition. So, my Spyderco collection is decreasing and my CRK collection is increasing.
I love SAKs, too, though. I think the SAK has to be one of the best bargains from a price/quality viewpoint. I have a zillion Victorinoxs and will certainly continue to buy more.