Will soon be looking to improve from my Marantz PM66 as I've read that, unlike most MA stuff, rx1 can be a bit too laid back and need a more energetic amp. Also they really thrive with higher quality amps. Given this and an absolute max budget of £600, what should I short list? My ideas are Rotel (RA10 or RA1062), Rega Brio R or something from Creek or Exposure. I listen to mostly rock and metal, but love live stuff of any genre aswell. Am I on the right track, or somewhere in a nearby field?! Ta.