IMO, Blu-Ray Audio discs are the best way to show off your your audio system; hi-def streaming is another way.
If you can afford the $$$ box sets that hold hostage the blu-ray discs, you won't be disappointed. Sargent Pepper and Who's Next are but two that come to mind.
Beck's "Guero" and the Led Zeppelin remasters on DVD audio are incredible.
Regular CD's: It's a Beautiful Day, Miles Davis "In a Silent Way", and Peter Gabriel "i/o" are well recorded also.