If you are drawing so hard that it hurts your jaw, you are not getting the throat hit expereince you got from analog cigarettes. I understand your need. To me, vaping an e-cig is like sucking on an ultra-light analog and it was certainly not meeting my expectations.
If you are not a DIY-type person willing to build your own high-voltage vaping device, then I highly recommend anything by Zi Moshi (fourm member secondsonxxx), a Screwdriver (made by forum member trog) or a GG (made by a Grecian forum member). These devices have higher capacity batteries, connections for penstyle or 901 atomizers, manual switches and outstanding throat hit. Though I have not personally used any of the mentioned devices, I did build a few 6v modified battery packs and can say with conviction that this is what vaping should have been...Wailting for wv2win to chime in. He is such a fanboy, but oh so correct.