This review of the Rega Brio-R matched the amp with Klipsch Heresey IIIs to good effect. It also has a very low noise floor, which is essential for an amp powering very sensitive speakers. The PrimaLuna One mentioned in the review sounds like it would be a good match. And another affordable integrated with a freakishly low noise floor is the Marantz PM8004. The s/n spec on the amp section is 125 dB.
