Kingston - who are they? I would politely suggest that the roost-ruling title probably belongs to Corsair - certainly they seem to be getting the most column inches. Just defected to them (8GB Vengeance) from Crucial (despite the latter's good customer support).
Sorry to see OCZ dive out of memory - they seemed to figure in most of the search results I got when I was shopping around. And I parted with some of my hard-earned for a Vertex 2E for a boot drive - quite impressed. Less competition in any market is not good for customers.
Think they'll want to pull out of the PSU market next - although from what I've read - pretty much everyone just slaps a badge on a PSU from one of a limited pool of builders, (Seasonic, CMT, can't remember the others).