I can vouch for RTM, excellent tape.
Between RTM and ATR I'd go with the one that's easiest for you to obtain. They are both very good.
REEL TO REEL TAPE?
LOOKING FOR NEW OR UNUSED REEL TO REEL 10 INCH TAPES FOR RECORDING, LOOKED ON EBAY, GOOGLE, NOTHING.
SEEMS LIKE NO ONE IS MAKING THEM ANYMORE. ANY HELP? CONSTRUCTIVE IDEAS? HOPE?