If that's a kit lens now I'm really jealous...
I hope you don't mind me tagging one on here, but this is to show what I meant earlier. This shot was taken a few months ago with the 50mm lens. Decent, but not even close to what you're getting. I wasn't going to show this one actually, but thought I'd give you an idea what my earlier comment was about. This is the best I've been able to capture so far, not even close to what I see above in your shots...yours stand out, this is just another snapshot...I just wish I could figure out what I'm missing...
Click image to view larger size.
Again I hope you don't mind, but then this shot will make yours look that much better anyway...
Oh and yes, I know I should have pushed the contrast a bit more, and this was taken before I got the on camera settings tweaked so I don't have to do any editing.