No personal experience but:

Bryston offer a 20 year guarantee in the UK. They are universally praised for their reliability and are used in professional applications.

My friends Musical Fidelity self-destructed after ~2 years with uneconomic repair costs. MF have short product runs and quick product life-cycles. I thought they sounded cold and clinical with a lack of detail. And that was through Quad ESLs

They are equally praised for sound quality in the various reviews I have read.

Based on this I would go Bryston every time.

In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.