SS to valve

Thanks Spencer. I should have indicated that I'm looking for recommendations. 

Thanks stringreen, carmenc & George. 

George could you further explain the benefits I would gain from using lower powered monos with the Tannoys?

Having only ever used SS I was unfamiliar with OTL amps & now I'm very interested...! How do the Atma-sphere M60 monos compare to the 300B monos from Transcendent Sound?
Are there any other manufacturers who produce good OTL amps?

Thanks for your input George...From what I've seen in your posts you're a very knowledgable man!
I've emailed Ralph...

I was also considering replacing my XP-20 with the MP-1 or MP-3...as long as he can include a remote!