Shopping in Ireland is not good. The main cities are Dublin, Cork and Limerick. All of them are miles from Rosslare. Rosslare is in County Wexford and you will only find small towns within a reasonable distance from the port. I suppose it depends on what you are looking for, but I would hate you you to travel over in winter looking for bargains or a wide selection of things. It is very expensive too. I would recommend a summer trip over though.