Should I use Aerojet Kerbodyne or Sum Dum for my Orion MPCV

[SpaceLaunchSystem]

I definitely like both mods. I also know Aerojet Kerbodyne requires SDHI, but I want a realistic service module for my MPCV. I know AJKB (what i'll call Aerojet Kerbodyne) has two service modules based off the Constellation Program but if I start using AJKB more, I'll have to choose which SM; Transport Vehicle or Exploration SM.

What do you guys think?

[Helix935]

well actually Sum Dum is a dependency for Aerojet Kerbodyne so you have to get both but if your really strapped for space, just take the aeroshell and paradocks from Sum Dum....