Name Brand vs. No Name Rechargeables??

Just looking into buying some NiMH AA rechargeables (2300 mA+) from the web, but would like to know if there is any benefit of buying Name Brand or if any manufacturer will do. They will be used for a Sigma flash.

I know that for specialized batteries, they are often manufactured in the same place, just branded differently, but not sure about NiMH rechargeables.

Anyone have some no name brands that are working fine???

Thanks,

Colin