The FZ150 is probably the king of superzooms, having all the features a more serious photographer would want. It's lens isn't as long as other superzooms, but it has RAW capability, PASM, and a hotshoe. No other superzoom has all three of those things, save for the DSLR-sized Fujifilm X-S1.

There are no other fixed lens cameras that will have the same or more zoom lens than your SX100 that also offer RAW. The closest available would be the Nikon P7100, which has a 28-200mm equivalent (7x) lens, coupled with a 1/1.7" sensor.