Yes, what Ben said. As for which is best? Keep your gap in between clubs at a bout 4* Most PWs are about 48 and SW is 56. Therefore, a GW at 52* is just right. If you happen to have a 58* SW, then a 53 or 54* GW would be the optimal club to fill the gap. As for a LW, try to keep the same ratio. If you are already hitting a 58* SW though, a LW is probably not needed. Don't be afraid to test out some clubs to see what suits your needs.