Mr. Tim,
Have you picked your plane yet? What are you trying to model?
I'm a sucker for twins, so I pulled every twin on Outerzone, HPA, And AeroFred. I also have the Black Hawk Models Electra L-10 in hand. My next twin will be a bit larger at 36", but it is the Frog Mosquito and will bear a pair of Medallion .09s. Then I'll tackle the Electra, but may visually modify it as a B-25 Mitchell.
From there, my next scratch built twin will be either a 1/2A Twin by DMECO (on OZ), or the Duellist MKIII 1/2, or the CG JR. Skylark.