Lucan
I live in Lucan, and am looking to leave. To be perfectly honest, I was looking at moving within the area because the one plus point is that it is an easy commute to work for me and did look at Finnstown, Grange Manor, etc.
Finnstown, etc are nice estates, but remember people bought in estates like this when they were approx. IR£70-£80K, so these people have been able to hold their properties and rent them out as well as buy elsewhere. This has led to a large number of rented properties, many which are rented to EHB tenants, the majority of which are non nationals. This would be the case in a lot of the Estates in Lucan, particulary new Lucan both new and old. You may have a problem with this, you may not.
Having said that, I agree with the previous poster, that having lived there three years, I have not had an ounce of trouble with anti-social behaviour, and live in a cul-de-sac, so it is very quiet.
I do not agree that the Estates named above are inhabited by "nice people". I looked at both Grange Manor and Haydens Park as well as some in the other estates mentioned (the property I looked at was an ex-rental) and they have just as much rented properties rented to EHB tenants as the rest of them, what makes them look less is that they are just not as big as Foxborough, etc. If you drive around any of these estates, you will see the unkempt properties.
I would only consider moving within Lucan to the village, to the more established estates which are huge money.