Thanks for the comments. I have decided to go with the Suntour model that Rad sells ( had a 25% discount Birthday promo). Will see how it goes.

I've been looking into adding a suspension seatpost to my RadExpand5. There are so many out there and so many reviews. I'm six feet tall and 220 pounds. Not looking to break the bank, just want a dependable seatpost that won't fall apart in 6 months. Any recommendations on what anyone is using and why you chose that particular one?