I would pick the 921 Switchback, hands down. I like the availability of the extra small blade for doing fine work such as picking out splinters and such as well as the modified Wharncliff design of the main blade, the shape of the hilt, and, as said in another thread, I love the blue color on the hilt. It has now come equal with my much loved Spyderco StarMate as my EDC for non-working days. Its only problem for me is that it is slightly too long for carry where I work, in Washington, DC, with its 3" blade limit, and in a federal government building where the law says that a flding knife with a blade of less than 2 1/2" is defined specifically as not being a "dangerous or deadly weapon" and banned as such.
My second choice among BM Axis Locks is the 770 Gent's Folder with its Carbon Fiber scales. This is one very dressy knife that would go well with a dinner jacket or even white tie and tails. If I were getting married and had the cash, it would make a perfect choice for groom's men's presents for even the most formal of weddings. It should, of course, be given with a penny so that the recipient could then give you the penny back to "buy" the knife, thereby avoiding the old curse that giving a knife to your friend will "cut the bond of the friendship." BTW, I have just ordered a Spydie Kiwi which appears to be another knife of this type; very slim and very smart looking.