My neighbour is putting up another concrete building and I don't like noise.
For the past few days I've used a Nuforce μDAC-2 together with Bose QC15 headphones. I tried the QC15s alone, but they don't suppress the construction noise very well on their own. They do better when fed music.
The μDAC-2 does well. It's not exactly highend (for context: I think Musical Fidelity makes highend gear, and I consider most Bose devices to be overpriced beep-beep gadgets). But it also doesn't offend me like most computer audio gadgets. It's pleasant, and allows me to work in complete disregard of the $#$@# concrete mixers. Well worth the price.