Originally Posted by Panda
... - dark like in clubs and stuff....
I doubt any consumer digicam is going to work well in light much lower than you can comfortably read by without using flash. Focus assist is usefull, but read carefully about the range - I think most of them are limited to about the range of their junky built-in flash units.
Though the Olympus has (I think) the fastest lens at f/1.8, keep in mind that is only a quarter stop faster than f/2.0 which is available on several other cameras. That means a shutter speed increase from (e.g.) 1/20th to 1/25th second - every bit in nice to have, but it isn't very much.