if you want something with some huge zoom and manual features then the panasonic lumix are nice or the fuji long zooms (not the S5000 for me though) canon S2 IS etc
for the money you will get a lot more out of them
if you want the whole shebang, then get a 350D DSLR
they are a lovely little camera to start you off, however they are serious kit and not as accessible as an more limited non-DSLR camera.
with the DSLRs you have to think about other lenses., the kit lens is so limiting for all your bits and pieces, it has no great zoom, low light is limited and macro isn't that great...the point though of this is that you can add these abilities later on. So 600 quid for a 350D is not the whole price, but the starting price.
Go into a shop and try out the canon.panasonic and fuji options and get some advice from someone showing you the cameras. or grab someone who has these things.
an ixus 50 (i have the 55) is equivalent to an APS camera.
very basic but a nice piece of kit to have in your pocket.
do some more research before you splash out....however if you have loads of money, then just go for the 350D and grow with it.