Thanks for everyone's advise, I am shocked by the amount of responses and I am grateful.
Been doing some more listening and maybe bright wasn't the right term. It's just on some tracks cymbals and high hats seem slightly distorted and not crisp.
For want of a better work a bit "splashy". Defiantly track dependant.
Splashy often means a mismatch between amp and speakers. Synergy is really everything, regardless of private or professional reviews. A well-matched 3 star system can be better than a 5 star set-up that doesn't quite chime.
as regards wattage of a amp, this hi-fi malarkey is strange. As I mentioned in my previous post, it isn't an exact science. Just because a amp has high power doesn't necessarily mean it can control a speaker. It boils down to how pure the current is and how that current is delivered.
Personally I would try a Rotel with the B&Ws if possible or revert back to the Monitor Audio Bronze. I heard the 352 with my old MA RS6s and it sounded impressive, which proves how important individual components interact with each other.
What you probably experienced was a "instant impact" in sound where it grabbed you immediately. I prefer a slow burning system, otherwise it could grate or become fatiguing over a period of weeks or months.