Anything by The Roots if you want some good hip-hop. GZA's 'Liquid Swords' too; masterful. The Twin Atlantic album was pretty good, as Christian said; you should check out some Jimmy Eat World (Invented, Bleed American, and Futures are three of my faves) and Death Cab For Cutie (The Photo Album and Plans as a starting point).
Give it a go. (oh, and Meshuggah's Koloss for something hefty!)