What source and amplification would you use to drive KEF LS50 speakers?

[LostHighway]

 

1. Small listening area 90% of the time but will want to play reasonably loud when the patio doors will be opened for parties but less than 100db

 

Ajax

 

My concern would be that 10% of the time. Most of the amplification options under discussion are, IMO, marginal but probably at least adequate for the vast majority of the proposed use. However, attempting to provide music for parties where the ambient noise floor is higher and many of the guests are outside the house with the patio doors open could very easily lead to disaster.