I drive my tube amp with a Sansui receiver ... sounds choice!
PS - Best option is a receiver that has a pre-out. My receiver doesn't have one, so I just have the amp chained into a tape loop along with my other post processors. I'm able to do that using a "Y" connection at the amp that allows me to close the loop back to the receiver - this also allows you to still use the internal amps maybe in another room.
Which brings me to a fine choice in amps if you're handy with the basics and can follow directions. The Latino ST120 kit amp is good for 60+ watts per channel and will set you back around $1500 ready to rock. It's a Dynaco clone built like a tank with some major improvements that gets rave reviews - including mine. Mine is a custom build with a few more bells and whistles and a custom case, but the basic out of the box amp will outperform a lot of much more expensive options.