I am quite happy with ERF as well, glad it has worked out. Good luck to you in building an energy position. I suggest setting some hooks down low and waiting for a pull back to get in. We probably have a flat to down period in front of us for the next few weeks that should present some buying opportunities. But...who know what happens if things get wilder/weirder in the Middle East.
At current prices, my favs are DVN, COP, APC, DMLP, COSWF, HGT, BTU, CNX, CCJ.