Active nearfield monitors. Very inexpensive (and I got it at a discount, as well, while I worked at Guitar Center) but very effective. Their only downsides are their relatively low wattage amplifiers, so it can't get that loud, and their bass response, which should be handled by a subwoofer, ideally.
My source for storing my entire music collection as well as running my preferred media player, Foobar2000. Current music library size is at 1.2 TB.
My (expensive) soundcard that I purchased with the intent of getting into music production. Alas, I've basically given up that pursuit, but am using this superb soundcard as my DAC, providing two balanced XLR outs running to my monitors and a headphone out for when I finally purchase a pair of Sennheiser HD650's.