Our baby will be in with us for the recommended first 6 months. I'd have thought it's a lot less disruptive if you can just feed him at an arm's reach rather than traipsing around, or going to check if there are funny/no noises on the monitor. The midwife at our antenatal class today also told us that babies sleep better with some familiar ambient noise so it may be counterproductive not to do so.
Hopefully the NHS website link will persuade your DH that it is serious medical advice and will help reduce the risk of SIDS due to the breathing regulation etc. My mum is of the opinion that babies need to learn to be independent but fortunately I can just ignore that advice, more difficult for you.
One thing we have tried to factor in is an alternative sleeping arrangement for nights when my DH needs to get a good night's sleep or if the baby is ill (we've been looking for a single sofabed to put in the baby's room but so far the only options are either super expensive or don't look very solid). Maybe that's your negotiating factor, that if he is struggling to get enough sleep to go to work, you'll invest in something like that or find another way for you to sleep in with the baby while he catches up. Hope you can get somewhere.