SH-25 MR, a few shots.
As far as I can tell, the SH25MR does have the same BSI CMOS sensor as the Nikon P510.
At the time I was looking at the SZ-20, comparing high ISO shots on the LCD with those take nat the same time on my Stylus 9010 with its 14MP CCD. Which is why the SZ10 dropped out of contention. Luckily I had to wait a bit, and the SZ-30MR appeared.
On the SH25MR you have a bit less zoom than on the SZ-10, but 800ISO shots no longer make you reach for the bucket. Your test shots are very promising.