If I may throw my two cents into the hat,
Having had some personal level of involvement with Inchicore over the last 27 years (and my family for the last 65 or so) I have to honestly say that the area is definately, to use the phrase, coming up in the world. My family are originally from the area, my dad moved out as an adult but my grandparents remained there, I have recently moved back into the area. There are so many pluses, there is a genuine community there, very good public transport systems (LUAS & Bus), close to town, close to the M50, a good housing stock (well built former council houses and fine victorian red-bricks) amenities in the village are good and to date we've had no bad experiences. To balance the arguement I fully accept that there is an element to Inchicore, however while the odd incident may happen - the general philosophy of they won't bother you if you don't bother them is very true. There is a pattern to the type of incidents that make the news - they're all personal, not random be it drugs, gangs, money etc - people are not getting shot randomly in the street anywhere in Dublin!
All I can say is visit the area, scope out the neighbours, try and go for a settled part of Inchicore such as the Tyrconnell Road area and walk around, balance this against your commute time, schools, proximity to friends and family and do the same exercise for Maynooth. From a financial perspective I certainly think that Inchicore offers some fime victorian house at a fraction of the price of areas such as Ranelagh.
Always judge for yourself, there are bad parts to Maynooth too, as there are in Blackrock or Donnybrook believe it or not.