It's not as difficult as you may think, Charlie. Though most of us have our favorites, most carbon shafting and components are quite well made nowadays. To reduce confusion, just pick one brand and stick with it to learn it. I've settled on Easton Axis shafts. I like the skinnier diameter, and they can be fitted with 50-75 and 100 grain inserts. Likewise, they'll take broadhead adaptors ranging from 20 to 125 grains. Add to that the plethora of broadhead weights and you can construct an arrow of just about any weight. Of course, inserts and adaptors are available in similar weights for almost all carbon arrows brands.
For mid-weight bows, say 45-50#, regardless of brand, I think a 500 spine shaft would work well for you, particularly given your somewhat long draw length (around 29 inches or more if I remember). Left full length, or an inch longer than your draw length, with about 200 grains up front in combination of insert, adaptor and point, and they should shoot well for you. This will give you an arrow in the 500 grain range, give or take a little.
Just have to jump in and get your feet wet. If you have anyone nearby who shoots about the same weight equipment at the same draw length as you, try some of their shafts. If they work, you can put together similar components for yourself.
Good luck.