Neni, I have tried probably a dozen different padded shorts/tailbone protectors.
First, make sure that you want full lower body protection or just tailbone/cheeks.
You indicate that you just want protection for the latter. I agree personally. I find the hip and thigh protection is unnecessary unless you are doing a lot of jibbing, and the extra pads just add weight and bulk.
Second, per Donutz, d3o-like pads are the way to go imo. Foam pads are not as effective and hard plates are not form fitting and therefore uncomfortable.
After trying lots of pads, I am now riding with Azzpadz d3o.
Large protection area for the backside, comfortable, conformable, and affordable.
These are what I would recommend.
Fyi, sorry Kevin, I tried the Forcefield board shorts. The coverage and padding was good, the fit was horrible!