I suggest you look at innokin iTaste MVP 2.0. It's a highly regarded box mod.
ETA: I can't give the Vamo a good recommendation. Although it's popular, it has problems with the 510 threading. When looking to buy any device I always tell people to browse the sub-forums to see what sort of problems current owners are posting.
I can attest to my own experience with a chrome vamo3 which I bought around December 2013 8 months ago, and so far I have changed the center pin insulator twice on it; the hardest part was getting the top pressfit off, but once I did that, I've found the design quite open to repairability; I'll probably figure out a way to mod the top to fit in an adjustable centerpin eventually.
The second replacement was only earlier this week; this time I put in one of the clear soft silicone type insulator pieces that have been coming with the newer protank coils; the earlier one I put in was the hard white one which eventually seems to crack and break apart.