Well since you can get neither of thosxe into a FOC that doesn't really help.
Personally my preference for playing marine based armies is a mass of power armour... its cheap to build, easy to play (and you can pull off some nice tactics) and to top it off, few players are really prepared to deal with it...
Everyone spends a big chunk of points in anti-armour weaponry/units... I take no armour... (well sometimes a single basic dread to soak up some fire power on turn 1).