Currently having this debate as DD (4 months today) is now sleeping through but tossing and turning when we go to bed and again from 4 or 5 onwards. She doesn't normally wake until 6.30ish though.
I know the SIDs advice is to keep them with you until 6 months but as we are low on the other risk factors we feel reasonably confident of her safety.
It's hard to go against the official advice though. Anyone else been in this situation?