A quick twiddle of the sliders in Lightroom (I couldn't resist):
Wow, that looks fantastic. I obviously need to learn how to use Lightroom. I have it, but obviously not using it to its full potential.
Thank you everyone for the feedback. I agree that they all seem a little under exposed. It was pretty dark out, which I was trying to convey, but they still seem too dark.
As for a tripod, I am going to wait for Black Friday/Cyber Monday to see if I can find a decent deal on a Monfrotto tripod and ballhead; my current tripod cost $20 and it couldn't even support the weight of my T2i with the 18-55 2.8 (the plate and locking mechanism were pathetically overloaded).