As I Mentioned earlier, we stayed in Vincennes, it's outside the main Paris ring road (Le Peripherique) but the local RER (light railway) is the same line that runs to Marne-le-Valley-Chessey the Disney stop.
The time share we stayed in was about 15 minutes from both RER and Metro stations. We liked the area, it was far enough out to be non-touristy and therefore cheaper, but we could get to the main sites in 30 mins or so by Metro or RER. Lotw of great places to eat - the local Chinese/Vietnamese/Thai standing out along with the local bistro that were both very welcoming and the wee corner restaurant where the owner brought his 1 yo son out (in pjs) to see our dd who was the same age. We had a great time there and are heading back in July if I still have a job
http://www.homelidays.co.uk/EN-Holi...ance_94-valdemarne_fr/appar_vincennes_r13.asp shows some renatls in the area.
There are probably much nearer and nicer places but we really liked where were were and it was reasonably close to Disney and Paris. The local daily open air market was great, fresh bread, olives, ham, fish, clothes, wooden kids toys, there seemed to be nothing it didn't sell. Market food in France is straight from the farm most of the time - you won't get fresher.
We had some great food and weather while we were there, everything from the food to the little cakes out the bakery that were wrapped up like they were being presented to a princess.
The only disadvantage was that Chateau de Vincenne (Metro) was in zone 2 but the RER (Vincesnnes) was in zone 3 so the carnet of 10 tickets only worked on the Metro, you had to pay a surcharge from the RER. Going to Disney was zone 6 so it made no difference. We bought an unlimited card in the end which did Disney and CDG.