Naim 5si integrated?? The reviews are good but is it still current in performance

I am downsizing from separates to an integrated amp. I have read  several very good reviews of the Naim 5si,over the years, but its power seems low considering some of the power requirements of even medium size room, 

Need to get some feedback from current or previous owners about its sound quality. Often reviewers mention the  "PRAT" factor of its sound , that is, rhythm and timing. I am not sure what the "P:" and "A" indicate.

I have also considered the Bel Canto 300i  which is  older in design (2009) but is more power and less inputs which I don't need.

Thank you

sunnyjim

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