Replaced my 1000 with a 530 last year, hated it. It worked OK I guess, but I found the buttons a bit fiddly and well basically it didnt have a touch screen so gave it to my GF and got an 830. Much better, touch screen was better than the 1000 and overall it was easier to use than the 530.
But then I found it too small so ended up getting a 1030 which, apart from the touch screen being only OK (better than 1000, not as good as 830), is brilliant for me.
For me, the 830 was much better, and worth the extra $ over the 530.