2 from this week - A900 + Min 20 2.8
Those are both great shots. I like your post-processing choices; they work.
In the second one, I can almost see the clouds moving. Maybe a little too hot on the exposure of the buildings? Makes me think "great HDR shot" rather than simply "great shot". But really nice, distortion included.
I have an a850 on the way and will be picking up a used Minolta 20/2.8 soon. You've piqued my interest even more in this combination.