We are considering purchasing new drums and equipment for the school this year. I'm already set on drums and stands (Dynasty), but I would love to hear some suggestions for drum carriers as it has been a long while since I have bought anything new. I do have a few requirements for necessary adjustments: shoulder width, body plate, and (for basses only) something other than just hooks and upside down j-bars. Any suggestions about current products on the market will be greatly appreciated. Thanks in advance.

Not entirely what you're looking for, but as far as comfort goes, the new Pearl carriers are the cadillacs of carries.  They are incredibly comfortable.

If you are getting Dynasty stuff, I've never heard anyone complain about the new T-Max carriers from Dynasty. They seem pretty adjustable.

I personally liked the previous carriers Dynasty made.Those were the most adjustable I'd ever had for kids of all sizes but Randall May had to ruin it and sue them over a simple back bar on the design of them. These new T-MAX carriers are the design they made to replace them.

We have the new Pearl carriers.  Very nice.  Have a few back braces on the kids with back problems/heavy drums.

Only issue that we are facing is that the very short bass drummers are having trouble with the rods hitting them in the thighs.

I just got the new pearl airframe carriers and my kids love them.