adimag,
What will you be using this for? Do you need the best steel?
I bought a crkt koji hara a/o because I liked the look of the thing. I'ts small, just manageable in my med/large hand, has 420j2 that isn't the hardest but resists corrosion and chemicals well, takes a quick edge, and disappears in the pocket. And it's inexpensive. Construction is tight and generally proves itself very useful for for daily cutting needs.
For something larger but still easily pocketable, the chive a/o works great for me. Splurge on the titanium zdp model and you'll smile alot. About the same size is the mini grip 556, not sure if it's really an a/o but it will flick open with a snap of the wrist and it feels really solid in the hand. It's about halfway between the koji and the chive in price.
I rotate between the three but actually find myself picking carrying my spyderco calypso jr. zdp blade. Not an a/o but opens so easily, is solid, light, sharpppppp and nonexistent in the pocket.