HDCD: What do you like?

I'm upgrading from my transport/DAC to a one box. All the ones that I'm considering are HDCD compatible, but my present system isn't, nor do I have much HDCD stuff in the collection.

I need some music to evaluate the HDCD players. What recordings do you like? Is anything particularly revealing of how the player reads HDCD.

(This can probably be construed as a "what do you like to test with?" post, but I'm hoping to narrow it down.)

Eric