To get anything significantly better you really are talking around the $200 mark.

something in ZDP-189 or 3G Powdered Laminate from Fallkniven.

i.e.

Fallkniven PXL Folder @ $210 (this is a really, really nice knife for the price )

http://www.knifeoutlet.com/shop/10Expand.asp?ProductCode=FALPXL

review http://uk.youtube.com/watch?v=wdklLprSB6s

or

Spyderco C90CFPE Stretch - ZDP-189 @ $200 (some folks can't stand the style)

http://www.knifeoutlet.com/shop/10Expand.asp?ProductCode=SPYC90CFPE