Question : Network tester

Hi all,
I'm look to purchase a network tester. I need some input.  I've listed a few, if you use one of these plese comment, is it easy to use? If you use something different, please feel free to comment on it. I appreciate you input.

These are just a few I have looked at.
 Psiber Pinger Plus Network IP Tester
Psiber Cable Tracker Network ID Complete Kit
Netfinder Network Cable Tester

Regards,
ABBEtech

Answer : Network tester

I have used all 3 of these but do not recall price, Fluke has been always 20-30% more because of the name:

http://us.fluke.com/usen/products/category.htm?category=NMT(FlukeProducts)