I only have a third that amount and I already have trouble just using one in a day.
EDIT: and I have two more in the post, one of which is a Model M. Cannot wait for that to get here.
The shine 3 is a pefectly good board if you need it now, but if you can wait, and actually like the huge knobs on the shine 4, then go for it. Personally I hate the knobs and won't get another Ducky until they get rid of them.