For all interested and for future reference...this is what Honda supplies on the oem 88-91 civic and crx.
1725 - 242mm fronts with drum rear
2040 - 242mm fronts with disk rear
4040 - 262mm fronts with disk rear

Prelude 88-91
3540 - 262mm fronts with drum rear

I guess it's going to come down to the balance of what suits your car. I think the 4040 is going to supply more fluid to the front compaired to the 2040. As the callipers that suit the 262mm rotors will have larger pistons than the callipers supplied with the 242mm rotors. If you find you have too much rear bias after the upgrade, i'd try the 4040.