Welcome!
I don't own a leek, but I think it's just a fancy chive and I do have one of those! It came out of the box SCARY RAZOR sharp! It flicks open most excelently! It locks up tight!
I don't carry it around as it is just a bit too small for my very large paws. But it is a hoot to play with!
I don't own a Benchmade 720 but do own a 350 with a Black Blade. You did very well by going Satin blade. I will NEVER get another black blade! I believe the 720 is Axis lock yes? I have handled a few and can't believe how slick they are!!! Open for the thought of it, and locked open until you by God want it closed!
The best compromise knife I own (and recommend highly!) is a Kershaw Ken Onion Vapor. Big enough to do work, small enough to not terrify sheeple, frame lock solid, pretty doggone sharp outta the box!
Best part? You get a few pennies back from a $20 at Walmart!!! I grabbed two Japan built ones while I could, but I have a China built Vapor II that only came a little less sharp, otherwise just as good (well except for the word 'China')
Anyway there you have it from the cheapest dude on these boards!!!
Again, WELCOME!!!