I'd say you're on the right track with Hightower out of those options. Tough choice when he's splitting with Wells, but I would think he has the best shot at getting you more points than the other 3. Unless you have a decent WR to throw in there stick with Hightower unless anything changes. Good luck!
m bush will be getting all the goal-line touches at home against Denver. DMac is used more like leon washington, bush is their banger right now.
Problem is Oakland is terrible and could have to throw a lot to catch up. Through two games Hightower is the best of this bunch and should continue to put up solid fantasy numbers due to his ability to run and catch well.