Priorities...

@bombaywalla ...we'll just agree to disagree, how's that?  The Tannoys don't need lots of power, you just want lots of power. Difference!  Our experiences obviously differ.  It's based on listening preferences, room size, etc.  Go back and read through all the advice here given to the OP to stay on track.

@infection, if you're in love with your amps and are seeking affirmation on how good they are then just keep them.  You started out by seeking advice yet give very little detail as @goheelz mentioned.  When I gave you advice based on my experience with Tannoys, which is extensive, you end up defending your amps which is missing my point.  Regards.......

@infection also, you mentioning the ARC amp and PMC speakers further suggests to me that you just want to try something different out.  That's why I asked you if you really liked the Tannoy's.  As my friend JohnnyR has told me more than once, "you're chasing your tail".  Now that I think of it, do grab the ARC amp and a pair of Vandersteen Treo CT and be done with it.  Buy lots of music and no more tail chasin.  You can just sit back and enjoy.  Regards.......

@carmenc - relax dude, we're just having a conversation. This thread wasn't seeking advice but opinions. Difference! (Couldn't resist). I think you've missed what I mentioned re: ARC Ref 210/PMC.
Another option is the Alta Audio Rheas...

@infection .....I am relaxed Dude!  I've found my speakers/system.....not chasing my tail and all over the board like you appear to be.  Advice or opinions, doesn't seem to matter as you seem to listen to neither!  Good luck, cause you're going to need it I believe.  Regards......

What...?? I'm not 'chasing my tail'. 
You need to remember what I've said - 

I will mention again that there is nothing wrong with the sound of my current system; it's very enjoyable. The situation is primarily capitalising on the opportunity of a very good deal but requires a possible compromise.
I say possible as I may be able to replace the GamuTs with a similar performing alternative.