Porter is solid. Brian is a talented winder. I have lots of his pickups and a guitar. Wolf from Wolfetone is a great suggestion. One of the best to deal with. Marshallhead bridge and Dr V in the neck. Awesome in a singlecut. Drop him a line, let him know what you want, and go from there. Wolf is the man.
Core pots for me. The taper of the volume pot is where it's at. Runner up RS guitarworks.
You can find used PRS pickups in that budget. 5708 is my favorite set. 5815LT is my favorite neck. 5909 is my favorite bridge. 5708 neck and 5009 bridge combo absolutely rock.. You don't see 5815LT for sale individually much, if ever, but that's a solid choice for the neck instead for a combo. Obviously LTs are a great choice for a set in the 594.
D2, love the neck, very full, the bridge is a little hairy for sure. It's not a set I'd use everyday but a great change up. Probably wouldnt think of them for a 594 first, but could be interesting for sure.
The DW tomahawks are some of my favorite pickups. They are by mojotone and on the DW ce. I have zero experience with the '59 but based on my experience with those I wouldn't hesitate to try.
Hard pass on me for skow. I know nothing about BnB. Pearly Gates are pealy gates. And always been a SD guy before Dimarzio for no particular reason, just worked out that way. My cousin is the opposite.