Do you know about the Respisense? I hired one for DDs first four months - it's tiny, and simply clips on the top of the nappy. It's about the size of a matchbox. It was absolutely brilliant - as it meant her breathing is constantly monitored, not just while in her cot. I found my DS not breathing when he was one day old, so I was absolutely adamant my DD would be monitored around the clock for her first few months.
I'm expecting another bub, and will be hiring the Respisense again - from memory they are about $23 per month - just search the Net, and you will find the lady that hires them out in Australia.
Bookmarks