We have been running V-joint tongue and groove for over 20 years, and it is used on most ceilings and also for walls. We mill it in 1x6 and 1x8 Yellow Pine in either knotty boards or clear (no knots) lumber. It also looks great with the staggered v-joint on each end and you do not have to cut it off on joists or studs.
The 1x6 is 5 1/8 face and the 1x8 is 6 3/4 face. We have several choices of finishes as well.