Here's a review on one of my favorite large folders, it's a shame they discontinued it, the Cold Steel Twist-Lock.
Nearly a foot long when open, an 1/8" thick Carbon V blade and weighin' in at almost 4 oz, this is one light weight chopper slicer.
With a rolled/Moran edge this hunk of steel was a slicer and a heavy chopper outta the box.
The knife is a dark tactical styled version of an Opinel on steroids, the ring lock leaves no doubt about it's security and strength. The handle fills the biggest hand while still feelin' comfortable with the average mans paws wrapped around it.
I've had and used mine for the last 10 years or so with no regrets and I do still see them on ebay ocassionally sellin' for $25-$40
picture courtesy of cutleryscience.com
Please read the linked review with a grain of salt

I didn't realize that it came from Cliff Stamp's web page:foot: so take it for what it's worth but I do stand by my short review, it's a great knife for the money.
Here's a link with a review comparin' an Opinel to the Twist-Lock, hope it's helpful and imformative:
Cold Steel TwisMaster Review