I don't think digital is available in the ROI, you might pick it up near the border, and at that it's sketchy. In short, a digital radio is (at the moment) a waste of time here. Not sure what plans RTE have to broadcast digital in the near future.
If you're looking for a good quality tuner, would recommend a Tivoli - bought one last year and the sound is superb. It's an analog tuner, but with very high quality components, it's a lot of radio.
They also do digital radios - website is
www.tivoliaudio.com