This post is not in response to any previous post, just my thoughts on the SX1 which might hopefully help some people with their thought processes on superzooms, and the SX1.
I have owned an SX1 for a few months now and am pleased with it for what it is.
Previously I used to attempt to digiscope the odd record shot, but being a non-photographer I only ever did that handheld, i.e. with no bracket paraphernalia, and I did this with varying success.
I think the SX1 is far more capable than me at the moment, although I am starting to get better at using it, and for my purposes, I am happy to stick my SX1 in my bag on the offchance I need it for a record shot. I haven't achieved any brilliant results yet, but I never expected to the way I use it (sporadically). My better results are in my gallery.
I considered going the full DSLR route, but I thought if I did that I would never want to take my scope and full camera kit out together. The digiscoping option worked well to carry (although always needed to take my scope and tripod!), but was awkward and a bit hit and miss to use, and I think a superzoom suits my outlook on birding, i.e. birder first, but likes to dabble in photography, and would like the odd record shot.
I think the 80x digital zoom of the SX1 has it's definite uses - I am not sure if I am correct, but if I am trying to take a distant shot, it somehow seems easier to use full digital zoom, rather than just full optical and then to crop in on the computer, as I believe at full digital zoom the camera knows "which bit" to focus on more exactly and so the results seem better to me than cropping in later. Might just be my imagination though, but it works for me. I tend to use the camera on 2.3x digital teleconverter most of the time as I think this works really well.
In summary, for me, the reach of the SX1 (optical and digital), together with the speed it can rattle off shots (JPEGs not RAW), image stabilisation, and it's portability have made this camera an important part of my birding kit.
If you are serious about getting the perfect bird pictures in extreme feather detail, then DSLR is really the only option though - there is no substitute for good big expensive glass attached to good big expensive cameras from what I have read and seen.
Malvin.