Gabs, I looked at lots of accountancy software a while ago and I thought by far the best was 'Mind Your Own Business'.
It's a UK based company, so is sympathetic to our VAT system and the like.
I've tried Sage some years ago, I didn't like it at all.
You'll only need the basic version of MYOB, I think it costs anything from £55.00 to £80.00, depending on where you shop. I seem to remember Dabs and Misco offered good prices.
Here's a link:
MYOB
In the end, I didn't actually go for it, I just use lots of spreadsheets in Excel. I can understand them, but I'm not sure if anybody else could
I may yet buy MYOB though, I like the look of it.
I back up all my work stuff daily to another hard drive and then about once a month to a DVD.