A380 J Class Seating Advice Request

[Concorde]

I have two J class seats booked SIN-LHR, SQ318. No seats available in the fwd cabin. Are seats 18D and 18F good ? If not, what is recommended ? Thanks.

[SQ LPP]

DF are good for two persons traveling together.
18DF are bulkhead. Should be better for sleeping since your feet will have more rooms to stretch around, instead of under that cubby hole for non-bulkhead seats.

Here is the pic:

Seats 18D/F

[Concorde]

Thanks SQ LPP; pics most helpful !