Thanks for the advice. I was thinking along those lines, but wondered whether I should go for slightly bigger, with a maximum of 120. It seems most people agree that an SW ED is the way to go, without going crazy and buying a Takahashi...
This time I'll be sure to check out the size of the setup in real life, as I need to be realistic about the practicality question. I can see that if it gets to be too much trouble then it won't be used enough!
(You have THREE?!)