I don't have any safe queens, all my knives get used. Some more than others, but that's the way I enjoy them the most. The only knives I keep mint in their boxes are the ones I don't like very much and purchase to trade with other knife enthusiasts, but that's not very often.
As to your question about the Manix 2 vs the Benchmade 940, I own both and like them a lot. They are high quality knives from excellent companies made from top notch materials. They are quite different, though.
The 940 is much more compact and lighter, while the Manix 2 is larger and broader (as well as heavier). I carry the 940 when I've got to wear slacks or need to fit a lot of crap into my pockets and want to save some space. You get a lot of blade for the weight! Although the overall blade length is almost the same as the Manix 2, the cutting edge is actually longer. S30V steel is great, although I doubt that it's performance advantage over 154CM can be noticed in regular EDC use. They are both good. The AXIS lock is great, totally ambidextrous, easy to operate and strong.
I carry the Manix 2 more often just because it feels better in my big hands. The handle is super comfortable in a variety of grips, I'm a big fan of the choil too. The ball bearing lock is great, quite similar to the AXIS. Since the blade is thicker and the hollow grind is not very high, it's not as good a slicer as the 940, but it performs well enough (I've got a couple of full flat ground models on the way!). It's built like a tank, and although I'm sure the 940 is more than strong enough to handle anything a folding knife should be used for, I reach for the Manix 2 when I think I might need something a bit heavier duty. The price is a big point in favour of the Manix 2 as well, $75-80 for such a well made American knife is a hell of a deal. You can get a Manix 2 and a SAK (a great EDC combo, IMHO) for about the same as you'd pay for a BM 940.
I still think the 940 is well worth the money, and an excellent addition to any collection or EDC rotation. But if I were just getting started with knives I'd go for a Manix 2 + SAK (there are quite a few Victorinox and Wenger models in the $25-40 price range).