I am using Callaway cavity/blades.
All of the companies offering blades have great offerings.
You must get fitted, but in my opinion, outdoors is a must.
Way too often, especially with pretty good players, the grind of the sole, and bounce is overlooked.
Mats in an indoor setting are very forgiving as far as the club "moving through" the turf.
Shafts/lies etc are pretty easy to fit someone for. Grip size, and how the club works through the ground
are hugely important and need a good fitter to help!