I use this one on my Ripcurrent. I'd recommend ordering the red spring, I'm 260 and it works great. In total it ran me $116.

Suntour Brand NCX Seatpost 31.6mm x 350mm / Black

NCX Seatpost Spring Hard-Red

I ordered from the website (https://www.srsuntour.us/) with the 10% discount

I also recommend the ARS seat: https://www.amazon.com/gp/aw/d/B0015RASQS?psc=1&ref=ppx_pop_mob_b_asin_title