Don't mind Raven...For every question he has 3 answers...and even when people don't ask he has 2.
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I bought my first Kershaw knife earlier this year and so far I've been super impressed. The Cyclone is a Ken Onion design and while it's a bit heavy it's way way sturdier than what I'm used to with my previous Gerber folders. Lets see if I can run down your criteria with it:
a. The tip isn't beefy but it's respectable. The curve of the blade is fairly sweeping
b. Just a liner lock...but it's beefy too.
c. Assisted thumb or index finger opening. Don't know why I went so many years 'flicking' knives when stuff like this existed. With this knife you can turn it off if you don't like having a spring loaded blade in your pants.
d. plain edge made from Sandvik stainless.
e. 2mm thick. 4mm seems like a lot for a folding knife...at least by my standards.
f. Anodized Aluminum scales.
g. Big enough for #550...what more do you need? It also has a pocket clip which is reversible for lefties like me.
This is where Raven gets to smile from the shadows. This knife is perfect...for me...and for what I need a folding pocket knife to do. Do I carry other knives for other situations...damn right I do. Do I think they're perfect? Yes...for me...and what I need them to do.
My advice is get out there and handle as many as possible. There aren't a ton of good knife shops in the Edmonton area but if you make the rounds you'll be able to get your hands on quite a few. Even the knife kiosk at Kingsway Garden Mall has some good knives...even if their prices are horrible.