I succumbed to the urge and bought a CB Nait 2 for a study system a few years ago, and had it serviced at Class A. It is indeed a very enjoyable listen and makes you realise that for the pure enjoyment of music it is all that is required with a decent source and appropriate speakers. The living room rig is much more immersive, nuanced, loud, detailed etc., and I happily enjoy the qualities of both.
At around the time I purchased the Nait I also picked up a couple of other British integrated amps from the period. An Onix OA21s which I had serviced and use in the kitchen and an Inca Tech Claymore, which was just too cheap to pass up. I occasionally swap the Nait and Claymore and despite the Claymore having had no service - it really is no slouch and gives an equally enjoyable performance. A bit more power and a headphone socket make it a real used bargain - and some have MM and MC capability, although mine is only MM.
There was something magical in the water in the 80's for British integrateds - Other examples from Exposure, NVA, Nytech etc. are also worthy if the budget doesn't stretch to the top of the tree Nait.