glenngpr,
Since there are five of you travelling on the CX flight, the following are my recommendations on the main deck seating on a 747-400:
11 AC and DEG
IF you are unable to obtain the centre seats of 11 DEG (these are the the only business class bassinet positions, they are subjected to airport re-assignment at the last minute to family travelling with toddlers).
The second option would be to take 11 AC, 12 AC and one single seat in the aisle 12D.
I hope this info helps.
I travel extensively with CX and SQ and found CX's service to be the best.
As you are a Emerald member of oneworld, then you are granted access to CX's First Class lounge. You may invite 2 more guests so therefore, you can take 3 people in total. As there are 5 passengers travelling with you, 2 will be access to business class lounges unless your partner is also an Emerald member.
If 2 of you are Emerald members, then it should be okay for all of you to access the First Class lounge at all CX/oneworld ports.
Please advise.