The CS Voyagers are not at all "bad knives", especially for budget street-defense purposes. The AUS8 steel combined with those unsharpenable serrations mean this isn't a good choice for hard-use daily utility, wire stripping, whatever.
The locks hold well. They're not all that smooth on the opening stroke, but they're pretty strong.
The "Gunsite" version of the 5" Tanto is a bit more refined than the regular 5" Tanto Large Voyager. If you can find the Gunsite at a god price, go for it...the differences are still only subtle though.
Now, SOG is about to come out with a 5" dagger-point folder with a modern lockwork and steel liners under Zytel scales, bolted together for full field disassembly and cleaning and with ambi-reversable clip and stud. At $99 list (figure $80 street) it'll be a SERIOUS competitor to the 5" Cold Steels. The SOG won't ship till summer. Check a thread I started on the SOG forum for pics, comments, specs.
Jim