Hi,
As has been said above there is no best integrated, it all depends on various factors, source, speakers and room.
Having said that it is a fact that Naim will give you good service if required and has a good resale value.
The safe bet is Naim, for the reasons in the sentence above, however try and listen to some in your own home, if possible.
All the best in your quest.
Cheers
John