OP - tough decision and not one I'd want to have to make. Personally I think I'd say no. When I was young and single I'd have seriously considered it and probably said yes as it seems like a noble thing to do, however now I have kids of my own it would be a definite no.
I don't think I could comprehend not seeing them every day and taking a back seat in their development. It's cliched I know, but they really do change your life and to be permanently apart from them would be unbearable IMO.