RE: Which 60-90-size electric F3A model?
With a 6S set up you have 'limited' choice. It will be very much be in the 50 sized category as most 90 sized pattern ship will be in the 7-8 lbs range and 6S is nothing much to shout about. True that the Angel S is a favourite now, that is because she does fly that well. If you like then wait for the Ms Wind, she will be in the US soon. I just got mine and she flies ever so well.
Do you want to get a glow model for conversion? Most of the so called 90 sized planes are best with a 120 and they need a lot of weight up front to balance well.