Ok, I've decided to go for these. I've researched them and seen that keeping these kind of blinds dust-free is an issue. The guy measuring up for me said he had black ones and the dust did his head in so he went and got white, which he's now happy with.
So my questions are:
If you have Venetian blinds, are they worth it when you counter keeping them dust-free into it?
What colour would you have if you went for it?
Which size? They have small ones (which I've already decided against), then 35cm and 50cm. I'm trying to google the different sizes but am not coming up with anything. I haven't been to the showroom yet.