The Aerospace Projects Review Blog continues to feed us cool retro rockets/spaceships with the TRW Mars Ship. With an ICBM-like capsule, it would be assembled in-orbit, requiring 6 Saturn V flights. It would achieve artificial gravity by spinning with two sections connected by a long cable. Scott's post has several drawings. I picked the one most likely to result in a modroc, just to tempt you. Scale purist should consider purchasing an issue of Aerospace Projects Review (if it is included in one).