Since I love Messiah, I try to keep up on current recordings although I purchase few, and too many of the latest suffer from an overload of ornamentation and fast tempi. My three favorites are these:
Sir Colin Davis' recording from the mid-1960s was the first to shake up the traditional, rather plodding Victorian approach to Händel, and it's really fine with nice tempi and no overload of ornamentation.
Charles Mackerras' recording is from about the same time, and it offer some nice alternates, such as the 12/8 verion of "Rejoice Greatly," and maybe a bit more ornamentation. I have Mackerras' Oxford University Press edition of the vocal score for Händel's wonderful Semele.
John Butt's recording is less than ten years old, and I think it's the best of the current crop of ultra-baroque editions.