Since Moebius already has the class8 licence with Navistar, I'd be happy with a Paystar with the 9900 Hood, Heck, both the Paystar and a 9900i or ix could be done with that cab and probably a frame very similar to the one on the Lonestar or Prostar.
As for trailers... A modern detachable gooseneck lowboy is high on my list! (Not a Rackley though...) East makes a nice gravel trailer, Doepker's looks good too. A Polar chemical tanker or a Tremcar 4 axle petroleum tanker (so cool!) would be really nice too! My two cents...