definitive technology speakers
1960's westinghouse console stereo
kenwood kd-550 'the rock' turntable with shure v15 III cart
black label society
corrosion of conformity
the last vegas
above are some of my favorites but I listen to all kinds of music from rock, pop, country, alternative, classical, acoustic, etc. when testing gear I use songs across all genres. I also test at all volumes, as I never listen to music at a static volume- mood and song choice often dictate volume.