Single source, best pre option?

I have only a single source component, and no plan to change.

I feel like an expensive pre would be a waste, since i dont need the variety of inputs, and I'd rather invest the dollars in a better amp. The amp will likely be an Ayre as I very much enjoy the sound of my Ayre integrated.

I need balanced outputs, and aes/ebu input would be nice.

Are there great sounding options that fit this situation?