I had some Sargeants from Yorkie on here but didn't find them a deal better, I think because when I have my pillion onboard I can't sit far enough back to get my arse on the wider part. Tried an air hawk which was a lot better but still not perfect IMO, so I tried turning it round with the wider bit at the front which then puts more weight under the thighs, taking the weight off the lower back. Again this was a further improvement, so with this in mind I bought a standard unheated seat off ebay and took it to Tony Archer and asked him to pad it out along the same lines, I.E more padding under the thighs. Haven't been able to do many miles yet but seems pretty good so far and looks tidier than the air hawk. Heightwise it feels about halfway between the low and high setting and is noticeably wider when stopped with feet down.
Incidentally great service from Mr Archer at short notice. I was over that way on a two day training course, dropped the seat in first morning and he said it would be ready early in case the course finished early on day two. (it was and it did) Proper service , tidy job and the offer to alter it if it wasn't right. Top man!