I'll jump on the bandwagon and say go with the MVP2 - more versatile, less cumbersome, less cost for a quality device.
If you like the box form factor, I'd suggest your next device (keeping the MVP for backup) would be something like the VaporShark rDNA30 (all the goodness of the MVP with more power and a replaceable battery), but they're a little pricey.
The eleaf linked above might turn out to be an MVP killer by the sounds of it, but I'd wait to see some user feedback in here before jumping in, especially since the MVP is so easy to get, cheap, and a good backup should you move on.
BTW, my suggestion would also be to buy from canvape.com. They have them at the price you quoted and are a very reliable vendor for us folks in the (no so) frozen north.