Depending on what you're looking for in a folder... a Spyderco Caly 3 is a VERY good slicer. If you want to splash out, you can even get it in ZDP189 with Carbon Fiber handle. (or the new Spyderco Sage if you prefer a liner lock)
For a dress-folder I'd take a look at Mcusta, they make some pretty good, pretty looking ones.
If you want the best of the best, go for a CR Sebenza, Umnunfaan or Mnandi... but be sure to have lots o' money at hand... a Bradley Alias could be a good alternative, but they too are getting pricy nowadays.
I had a ZT0302 and while it's a beast of a folding knife (I even dare to but it on the same level as a Strider), I found it too bulky and heavy for EDC. Same with the Strider folders, perhaps the PT is an exception, but I haven't handled that particular one.
...and don't forget about the Benchmade Griptillian, another affordable decent folder which you can get in almost every configuration to suit your needs.