Late to the game on this thread but surprised nobody mentioned Ornament & Crime (or Disting EX or MK4) which give you a lot of flexibility in a smaller HP case like this, especially if you have Hemispheres installed on O_C, which is also available a 1U version.
Throwing in for FX Aid XL (or even Pro) which is 10HP smaller than Ghost (2HP less for FX Aid Pro). I think for a smaller setup like this, FX Aid XL will give you excellent effects in a much smaller module...and now you have 10HP more to play around with :)
JB