Actually, in a time when Raiders are death traps, I have found my Hellions appearing more frequently in my lists, not less. I definitely would usew them in a 2000pt game, adding a Succubus with Punisher/TH/TR. Just remember... Hit n' Run! They also require support. Usually a warrior squad with Sybarite is adequate although more coommonly it will be Warp Beasts or Reavers, the onlythings n the army able to keep up quite that much speed.
When using my mixed footslogging armies with just 3 raiders, I tend to really value the Hellions for their movement bonus. Also their jink saves adds a little extra protection. It's saved my Hellion squad from a pinning test vs AP 1 Path Finders and has avoided many an ordinary shooting morale check by keeping casualties lighter. Hit N Run is the Gold, allowing you an extra charge on every turn you are in or can reach assault.
I love the models too, they are reallycool. Also my Succubconversion is cool, if I say so myself!