Is your work in Roscommon Town?
I grew up in Athlone and moved to Roscommon Town 10 years ago. I love Roscommon Town and would never move back to Athlone. Can I ask what put you off Roscommon? It's got pretty much every thing that Athlone has. It has a new Cinema, Bowling Alley, Tesco's, Lidl, Dunnes Stores, Aldi, Boots etc. Houses are cheaper and crime is low.
It also has a wonderful Town Park and Castle, Art Centre, Book Clubs and Mote Park Forest (popular for hill walking) which is just outside town. Everything is here in Roscommon Town. Only downside is that Roscommon Town is a least an hour away from a Hospital since the downgrade of the local one.
If I still haven't convinced you then my recommendations of places to live near Roscommon would be:
1. Carrick On Shannon. (Great nightlife & restaurants)
2. Castlecoote (Lovely sleepy village)
3. Athlone (Good range of facilities)
4. Boyle (quite, 15 mins from Carrick)
5. Knockcroghery
6. Athleague