eeSilk or eeSilk+ ?

4speed

Member
Region
Europe
I am about to treat myself with a suspension seat post for my commuting, and currently trying to decide between eeSilk and eeSilk+. Road is 17+17 miles of all tarmac/asphalt but with a little too many cracks, patches and such. Bike is a rigid 29" on 37 mm tires, with a Brooks B17 and my 210 lbs on top of that.
Is there any good reason not to go for the eeSilk+ ?