Night HDR shot of Zakopane

I wanted to take such a shot for quite a while but it's rather difficult in Warsaw as there is no ideal high vantage point. There was one in Zakopane, however. I took this shot from 1100 meters above sea level while the valley is at approximately 700 meters above sea level. 400 meters of difference produced pretty nice view I believe.

When composing the shot I knew what I wanted to achieve. I wanted several layers (sky, mountains, town and snow) and also made sure that 1/3 goes for the sky, 1/3 for the mountains and valley and 1/3 for the foreground. I think that this composition works pretty well here.

EXIF data:
Camera: Canon 5D MK II
Lens: Canon 24 f/1.4 L USM II
Focal length: 24 mm
Aperture: f/5.0
Exposure time: 13 s ("middle" exposure)
ISO: 500
Number of exposures: 3
E.V. Step: 2 EV
Flash used: no
Tripod used: yes
Filters used: no
Software: Magic Lantern 2.3, Photomatix Pro 4.2.5 (Exposure Fusion), Lightroom 4.2, Photoshop CS6