Mark,
In my wish list for your tests is the Hahnemühle Baryta Satin. It was presented in the last photokina (2014), but the normal supply really started less than one year ago.
Now is one of my to go papers. warm, nice satin surface, no OBAs. I like to print 10x15 (cm; 4 in an A4 sheet), both color and BW. For larger (A4. A3+), mainly BW work. It remainds me a postcard and old bw photopapers. The price settles between the "IGFS/Canson Baryta/HM Silk" family and the priced Hahnemühle rag Baryta, all them in my stock (Silk from Hahnemühle, because i get better price).
I'm in Europe, otherwise i would send you a sample asap. Tell me if you have interest but difficulties to get it
I also have the Harman by Hahnemühle in my stock. I use it mainly for landscape and those pictures that need to pop a bit more. It has OBA, but not as much as the bluish Canon platinum, plus a better base. I don't see it for BW, too glossy for me. And, yes it comes curled in A4 boxes.
As amateur, private consume, my approach to papers is more about surface, feeling, OBAS (preferentially not, but ok if needed) and price. Depending on the picture and the mood, I'll select one or another.
Cheers