Yes your NAD set-up will drive them fine
They are superb speakers but need good stands under them (the likes of the Atacama Nexus 6i's at a minimum; preferablly mass loaded with atabites)
Your NAD combo will sound very good with them BUT it could be a consideration to upgrade your amp to the likes of the NAD C326BEE or even the C355BEE in the near future
The RX2's have a superb soundstage; superb bass weight thats taut and punchy and a well timed, detailed midrange with crisp, clear treble.
The sound difference will be VERY noticable over your Tannoys but the RX2's are close to 2, maybe 3 times the size
