a question abut MSI gtx680

I think they OC about the same... its just that early Lightnings have more voltage tweaking options

 

I remember seeing review here about lightning, good overclocking with voltage changing.

Think ASUS card couldn't be pushed as far but I know lightnings are hard to find, (they are here in Britain anyway).

Its up to you though, i'd go lightning if you can get one one but the ASUS is a good card if you can't find one.