I've been running a Cary Rocket 88 for the past two months to drive my K1000s, and it is definitely a keeper. Single ended and balanced inputs, 20/40 watts per in Triode/Ultralinear modes - I like Triode best, and find the 20 watts plenty. Highly recommended. Here are a couple of reviews: Positive Feedback.com Enjoy the Music.com
And, it's a looker ...