I do like NZ a lot in business class. Service is great, very warm and friendly! The current business seat is ok, but of the "traditional kind". If the seat is important to you I would only recommen NZ for day flights. At least until NZ gets the new business seat, which you will not yet have on the 767 serving HKG.

Old seat has only traditional IFE with rather small screen.

Connections from LH's flights from MUC and FRA into HKG do not work out to well with the departure of NZ 86 at 19:15.

Overall SQ connecting in SIN seems the best option.