Arrived this morning and I went straight out to give them a go. I am not used to using bins so I am no expert but these things are light and give good hand held views. I will get used to holding them steady in time, I wouldn't have liked to be holding a 10 without support.
Thanks for the recommendation Stuart. I can't imagine spending more than £200 and these seem great.
Stef, if you still haven't made your mind up, you could do worse than these.