Robins are ok. I believe they keep Magpies away too. Don't quote me, but once the eggs hatch and the birds are ready, they will be gone.
I don't know for sure, but it looks like robins nest for 13 days and then the brood can fly away within about 13 days as well. So it's a 1 month nuisance at most? You can always dismantle the nest after they leave.
Based on what I read, apparently if you move a nest, the robin will abandon it.
http://www.allaboutbirds.org/guide/A...in/lifehistory
http://www.learner.org/jnorth/tm/rob...hool/text.html