Quark UBEC for my Neu 1515 1.5y/s brushless system ; 5A or 6A? which way should I go?

[shawn197]

Unfortunately, I bought another Pro-BEC from a local hobby store.
►Input Voltage Range : 11.1V~55V
►Amphere Rating : 5A : Continuous
8A : at 30Sec
10A : at 0.1Sec
►Ouput Volt Range(Programmable) : 5V +/- 0.2V
6V +/- 0.2V
►Ripple : 10mVp-p(@1A/15V)
13mVp-p(@1A/30V)
►Efficiency : 96.5%(@1A/15V)
►Dimension : 45 X 23 X 13 mm
►Weight : Under 23 gram

Do you think it's bad based on what you see on the spec?