If I were you I'd get something like 5 of those eGo cartos and then get an IBTanked and at least 5 cartos for it. Much better flavor and more consistent hit with the tank setup. There's a learning curve to the tanks, though it's not too bad. I just got my IBTanked a few days ago and I'm loving it. I did ruin the first carto I put in it because I didn't punch enough and big enough holes in it (using 30pg/70vg). I didn't buy prepunched cartos, I bought one of their punch tools. It's not exactly cheap to startup, but the expensive parts will last a LONG time. 56.09 shipped for 25mm tank, stainless end caps, 510 drip tip, extra o-rings and washers, refilling drip tip (you definitely want one of these), carto punch tool, and a 5 pack of 2ohm Boge cartos.
edit...The 25mm makes the Twist really top heavy, you might want to get the 19mm for better looks.