IMO, if you're -really- set on the V3 sound, there is no all-in-one alternative. V3 + an inexpensive MT2496 and CF card as a recorder, and you're pretty darn compact. If you're on a budget, I think the Warm-PLUS mod UA5 sounds mighty fine and similar to the V3, as does the Transparent-PLUS UA5.
Perhaps the ACM 671 compares, I haven't heard enough to know.