The Reference 3.2's will walk all over the RX6's, but they need much better amplification than the MA's do. You'd have to be looking at integrated amplifiers of at least £2k, but ideally pre/powers to get from them what they're capable of. With the right amplification they'll reward you heavily, but this route won't be cheap.
It's better to have a lesser speaker driven properly than a better speaker not driven properly.