Because you are looking for something that heats up fast I would recommend the MFLB. There aren't a lot of vapes that heat up really fast, but that one can work quite well. I would suggest you read the thread on fuckcombustion about the mflb for more reviews. If its used correctly it can work fantastically, and its not particularly hard to do that, you just have to spend some time experimenting and perfecting your technique. You can buy replacement batteries from the company if they die, and many people buy better (stronger) batteries too.