Fujifilm FinePix S100FS Review

I actually bought a Sony a350 and was so dissapointed with the images I was getting, I took it back to the (indipendant) camera shop. Even with the Zeiss lense, it wasn't much better. The assistant suggested the s100fs and I have found it to be excellent. The only niggle is the maximum 'bulb' exposure of 30 seconds which is a bit limiting for night / movement photographs.

I currently have a lumix fz 28 and am already looking for an upgrade. I do mountain climbing and love landscape and wildlife photography. The thing is that I don't find myself ready (or wealthy enough) to upgrade to a dslr with a such a great zoom. The reason for the upgrade is that even though fz 28 is a great camera and has received great scores on the net, it somehow does not really satisfy me, especially when it comes to night photography.
I can get a Fujifilm FinePix S100FS for about 480$ here in Iran And could also get the new lumix fz38 for the same price (panasonic cameras cost a lot over here, don't know why). Which one do you guys think (especially those who have had this camera) would serve me better? would you call switching from fz 28 to s100 even an upgrade in image quality? note that I can get rid of my fz 28 for a good price (around 350$).

I would appreciate your help.