i would go kershaw, they make a great knife, have the best customer service in the business and are available in all kinds. You can get a speed asisted version for ess then the mini griptillian, which i had, but got replaced by this
http://www.kershawknives.com/productdetails.php?id=34
this has held its edge, is very fast opening and very durable. If you want to spend a lot of money check out the Strider folders, they are the best there is.