Wow, that is one cool looking amp! I dig the tube glow.
Like you, I would be concerned about the quality of the source. I don't know how great the DAC or amplifier in your laptop are, and if either suck, then the end result isn't going to be great. Which laptop do you have (as some people here might know what's inside)?
I'll throw this out there. My brother got a Blue Yeti microphone (and then so did I), and he loves the headphone DAC/amp performance of it. It plugs into your computer using a USB cable. I haven't used it for headphones myself, but my brother uses it with a pair of Sennheiser HD 600 headphones and is very pleased. He got his for $80 on sale at Newegg, and I got one about a month later for $90 on Amazon. So, it costs about the same as the amp that you're looking at. It is pretty large, though.