I have tried SR-7 seats but felt it was too similar to stock seats (it was comfortable but not body hugging enough). I have also tried Sportsters seats but felt it did not provide not enough shoulder support and it's more expensive than SR-6 and SR-7. Thus I got these SR-6 seats from Japan. SR-6 is more body hugging than SR-7 and sportsters. It has great pelvis, waist and shoulder support. Much less expensive than sportsters seats. Looks good too! Comfortable enough for me in long drives.
Drawbacks: It's cloth so it needs occasional maintenance down the road. No side seat airbags (the rail kits comes with the side airbag canceller). Getting in and out of the rear seats is slightly more troublesome (space is a bit reduced even with seats all the way front and folded). Getting in and out of these seats requires a bit more effort than stock seats because of the raised sides but is not difficult.
Overall I'm happy with these seats.
For those interested, the seat rails product number is 2014.024.1 (L) and 2014.024.2 (R)