Hi Derek, thanks for the comments. The vises I decided originally were just what I wanted but way too expensive. Then I considered how long it would take to finish the bench and what they would cost me per week over that time. Given it took me two years to get to this stage it was less than $10 per week, which didn't seem so bad - so that's what I did. A few birthday donations helped to speed it along. I'm glad I did it as they really suit my method of work.
I'm considering this - do you live near a railway?