What 18650 batteries should I get?

Meh, ok, one more attempt to find the best deal, any one have something to say about these Xtar 2600 protected ones:
http://www.pandawill.com/2pcs-xtar-18700-2600mah-37v-rechargeable-battery-p54223.html
http://www.pandawill.com/2pcs-xtar-18700-2600mah-37v-rechargeable-battery-p54212.html
(whats the difference, aside from warehouse location and 1$ price difference?)
???

People seem to reccommend them in this thread:

Also, did anyone encounter the same low capacity issue as 2100 did in this post:

???

Still without batteries and my C8 are on their way, not the best situation, should have been the other way around, batteries first, flashglight later :D!