$1000 amp for Rega Planar 3 + Silverline Minuets

I'm looking to replace my Marantz 2238B receiver, which is starting to seem like the limiting piece in my system. I've got a budget of ~$1000 and was looking at the Rega Brio, but wanted to get some other suggestions. I will probably upgrade the Minuets in the next few years as well, so I'd like something that could hang with the next level of speakers. Appreciate any input, thanks!