FWIW, I preferred the BMW Comfort seat over the Sargent seat I had later on the Gen3.
£268 seems decent for a new complete seat.
Don't forget to look for S1000R as well as RR.
I have a Wunderlich Aktive Comfort on the K67, it was decent for my tour up north but on track I think I was too high to be comfortable. I think I prefer being more 'in' the bike, just like Toprak

. The jury is out, I could be convinced to let the Wunderlich seat go. Lets face it I will probably go full track conversion soon...