Pretty much any Spyderco (or Kershaw, one of my favorite companies...) knife is going to be awesome. I've never bought a knife online, but I've heard good things about http://www.cutleryshoppe.com
. If you watch YouTube videos for real steel guns, knives, gear, etc., search for Nutnfancy. He is (IMHO) one of, if not the best reviewer of said stuff on YouTube.
Hope this helps