Have you considered the 'Indulgence' from Eastmall? (I'm too new to post links to the Site or I would)... at any rate... here's some info about it that I think makes it a great eCig (at a fantastic price also)... $59 plus shipping gets you all of this;
4pcs of Platinum Thread Caps to suit DPV9 (KR808D1)/EM9 (901), EM4 (40X), EM5 (510) & EM8 (801)
1pc of Platinum Indulgence Button Section
1pc Standard Platinum Indulgence-V2 Battery Cup with Indulgence logo on
2pc Indulgence 18350 3.7v Protected Batteries - 900mah (true mAh)
1pc Universal Battery Charger 3.7v for: 18650, 18350 & 10440
1PC Indulgence Carrying Case (very useful and could hold lots of stuff)
1pc of 3.7v Atomiser of your choice including 5 empty carts to suit (choose below)