Don't bother balancing.
Go with an 11 X 5 prop.
An ARF usually takes a complete newbie about 40 hours to assemble, a RTF about 6. But with the RTF you have to take what they give you for radio and engine. Which do you want?

Generally speaking, go the easy route while getting started. If prop balancing was critical, everyone would be saying balance it!

Same is true of most things on RCU. If you're getting a mixed bunch of answers, it means it's not crucial, or no one brand is that much better.
Dennis-