It would help to know what makes up the rest of your setup. I can't imagine 2 companies and sounds that would be less alike than Krell and Rega.
I'm purelly digital.
Squeezebox Touch -> Rega DAC -> Krell s300i -> Focal 836W speakers.
The speakers are fast, punchy, extremely accurate, detailed and not very forgiving. Add the Krell on top of that and I think I'm a little too analytical over all.
The Krell worked really nice with my less efficient NHT Classic 4s. Now with the 6db more efficient Focals it's way more power than I need, I have wiggle room.
I've heard the Brio-R driving my speakers in a show room and I liked what I heard. Of course my room will be different but I can probably get a used Elicit and if I don't like it, flip it without any great loss of $.