Apart from the zoom, I can't see any benefits of the so called bridge camera with the introduction of mirrorless (olympus PEN, panasonic GF/GH). Most bridge camera are still using the pathetic tiny sensor. A 4/3 sensor simply beats the hell out of them.
I almost vomit blood when I use my friend's SX30, sharpness is not acceptable, extremely poor dynamic range, very small and laggy EVF, noise at ISO100, colours are inaccurate. It can't even hold a candle to Fujiflim compact (F200) with bigger sensor. Sorry to sound harsh. Note that I only use compact cameras and micro 4/3, no experience with DSLR and I already have this comment. Difference is huge and I will never ever get bridge camera and will never recommend to anybody. Unless, as I said, if they need the long telezoom with a very limited budget and size consideration.
If looking for IQ, any camera with a tiny sensor is not what you are looking for. At least some with a bigger sensor like G12.