If I'm not mistaken the Rogue is cheapaer than the Naim -- so no sweat there. That said, the Rogue's much higher power output will drive the Revels better.
However, if you want bang for buck, the Musical Fidelity M8s - 500 gives you about 500W for 4-5k. That should have better driving capability than the Rogue (not to mention the Naim).
I have always been favourably impressed by these MF amps, especially their nuvista series: they perform very well & do not cost the earth.