On modern wings -which are thin airfoils (10% aprox) honeycombing is simply of little/no value.
If you have a clamping setup to properly laminate foam to balsa -then select balsa grade/ grain/ thickness.
a 1 lb virgin foam (this is very important and can make a huge weight difference) pressure bonded with Probond or laminating epoxy will provide the best weight / strength wing you can do .

The foam - laminating agent and wood must all be dust free and even and exactly aligned or voids in surface may occur.
done right - you can not peel wood from foam -anywhere.
also you can barely detect the joint - the lamination will appear to be a fused thing - experiment first with pressure and adhesive - you will see.