I might get some boos but I would also consider riding in a treeless saddle. I also have back issues (had a 250 lb. patient fall and take me with her which equals a 25 degree rotation in my spine and a bulging disc) and found it to be the fit for me. I ride in a Bob Marshall Endurance Saddle. There are a ton out there but most have demo programs that aren't bad. Email me if you want more info.