If you still want a big zoom range, but don't want the bulk of the SX30 IS, then the Ixus 1000 HS is it - it has a very nice 10x zoom lens equivalent to a 36-360mm lens in 35mm film format, yet is just 22.3mm thick.
The Ixus 1000 HS has a 10-megapixel image sensor and also features Canon's HS System which allows for ISO settings from 125 to 3,200.
One notable feature apart from the long zoom range is the 1080p Full HD video recording with stereo sound.
All the usual shooting modes are present, including Smart Auto mode as well as a plethora of Scene modes, including a Handheld Night Scene which allows for low-light shooting without a tripod.
The Ixus 1000 HS has a recommended retail price of USD 466 ++