OP, I had the same problem as you did back when I was looking to buy a bike. I live on a 4th floor walkup. If I were gonna have a bike this as a daily commuter, mtb and hybrids are out of the question for me coz it's simply too heavy. [insert long boring stories of dilemma here] In the end I got myself a kilo and I'm really happy.

Unless u can find a deal on craigslist, I'ld go with a bike on BD to avoid hipster tax.