The greendale road is a lovely area and the schools have a great reputation - Gaelscoil MÍde springs to mind instantly. The area is far closer to Kilbarrack DART station which can mean the difference between a seat or not in rush hour commuting.
Historically the boundary of Raheny extended all the way down to Howth Junction Train station and in some cases people have been referring to their houses as XXX, Kilbarrack, Raheny, Dublin 5! This has been going on many years, trust me - I remember clearing out the house of a family member who had sadly passed away and finding letters with this type of address format and being very surprised.
Having lived in the general area for a while, and having family in the area I have a great insight into the "goings on" and the trouble that some parts of Kilbarrack can experience. To be honest with you where-ever you are going to live in Raheny you will have to deal with a little of the bad social behaviour, but some areas are hit worse than others. I loved living in Kilbarrack for the closeness to town and my job, and easy access to amenities such as shopping, church, transport, and leisure options. I hated living in Kilbarrack for the lack of fresh air, anti-social behaviour and antipathy that some people had for their community.
One of the first things we noticed when we moved away from the area was how peaceful things could be in our new location - and trust me, our estate can be less than peaceful at times!
Best of luck with your decision, see if you can find people who live on the road you would be planning to move to and get their opinions on why they like to live there.