Personally i perfer high output pickups, but then again i'm not a fan of single coils. Generally speaking you want a balance between the neck and bridge. if you look at some sets you'll see they generally pair one output with another.
As to the pro shop, this is from the FAQ on SD's website
"We have a small brochure that lists just our 28 most popular pickup models. These pickups account for more than 80% of all our sales and generally meet the needs of most everyday players. However, we make another 80 different models of pickups. These include a lot of the more esoteric pickups (like Quarter Pound for Jaguar, for instance). These pickups are the ones that are most likely to be used by the pros and specialty players, which we appreciate. To honor them, when we updated our packaging, we designated the specialty pickups as "Pro Shop," for the pro players."
