As a singer first lead voices don't concern me too much as they are all up to par for accompaniment and solos for a singer/player. It amazes me how little people use sounds anyway in their performance demos songs...mostly I hear lead piano, but not alot of changing instrument lead sounds thru-out the song which gets boring to the listener imo...
Everything out there in arranger category is fine to do almost anything these days....the silly nit picking gets less and less as technology progresses..............just pick one and enjoy playing and learning it's features and you will be more then happy at this point.