You can stick with DX/KC pro for anything mids speed or lower, it wears in surprisingly slowly, especially with the stiffer dx in recent runs of Rocs, and the good baseline plastics of Trilogy/etc.. Avoid Discraft pro-D. That stuff is yuck.
For fairways and drivers, Pro plastic is great for stable (straight) and understable discs. G-Star will give you a little more durability, but I don't find it worth the price difference, and I like the feel of driver pro better. Pro has lots of glide, and is fairly resistant to wear. The amount of time it takes to truly beat in is overstated, it just starts out a touch less stable. For overstable discs (firebirds, etc.), champion or star equivalent is the way to go. They'll stay the way they fly off the shelf basically forever for your average player.