Excelsior Class Refit - U.S.S. Ticonderoga - a name-history that is almost as long as Enterprise. It has a nice ring to it.
Sovereign Class Assault Cruiser - U.S.S. Arapahoe - It seemed to me that Sovereign class ships should be named for sovereign nations.
Defiant Class Refit - U.S.S. Yeager - Named for good old Chuck Yeager, and the hunter connotation doesn't hurt either.
MVAE - U.S.S. Crossfield - Named for A. Scott Crossfield, one of the co-creaters and first pilot of the throttle controlled rocket engine and the X-15 space plane, test vehicle and forerunner to the NASA space shuttle. (Thanks, Scott. Well done. r.i.p.)
Nebula Class Refit - U.S.S. T'Pau - Named for T'Pau, referenced in Star Trek since Amok Time. Vulcan dignitary that declined membership on the Federation council.