Any of the places mentioned above will see you fine for UCD.
Don't bother looking past daft.ie[/url:1xbjozn5] if you're searching for somewhere.
Some general advice as regards renting in Ireland.
Up until about 6 months ago, renting was a sellers market and landlords could name their price, but that has been changing rapidly. Rents are only going one way for the foreseeable future, and that's down. There has been a steady increase in supply so renters can afford to be a bit more picky.
That said, good housing, well located will always attract a premium and generally will be snapped up quickly, but you should still be able to find somewhere suitable for a reasonable price.
I think, however, that a 6 month lease would be the exception.
If you use Firefox, then I'd visit Property-Bee[/url:1xbjozn5] and install the toolbar, this keeps a track of rents and time on the market of anywhere you're looking at, which might give you and indication of where you stand with regard to certain houses.