This Forum Beta is ONLY for registered owners of D-Link products in the USA for which we have created boards at this time.
The only difference between the 880L and the 868L is the 2.4Ghz is 600Mb on the 880L where the 868L is 450Mb on 2.4Ghz. The 5Ghz radio is the same speed 1300Mb. I could throw a monkey wrench in your decision making with this contraption: http://forums.dlink.com/index.php?topic=60895.0
OMG, it's hunge and comes with power brick. LOL. Thats crazy.
Red is the new Black:http://us.dlink.com/products/connect/ac3200-ultra-wi-fi-router/