Hmmm, housings for dSLRs start around NZ$2500, so whilst there’s not much in it compared to the G9/Ikelite package, they’re not exactly cheaper!
I have a Canon S70, which is probably not notably faster than the S50 (just more megapixels I think), and I can’t say I’ve found the speed of the camera a particular problem, or at least not one I’m keen to spend over $2000 to improve on, but that is a personal opinion of course..
Sealife do a point and shoot that they claim has less shutter lag than ‘mainstream’ competitors, but I have been unimpressed by the build quality and general feel of the camera.
Sea and Sea offer the DX-1G (I think that’s right) that also claims less shutter lag. I don’t have current pricing, but Sea and Sea point and shoots have traditionally been more expensive than their mainstream competitors, and given they are rebadged Ricoh cameras, I remain a little sceptical of their claims of being better designed for u/w use (unless the Sea and Sea versions have a different firmware, which is possible, but I’ve seen no evidence either way on that).
regards