I've been using the Lavatube for about a month, coming from a standard eGo, to a Kgo VV, to the LT. Fortunately the LT was given to me, so I didn't have to pay for it! I love it, it's battery lasts a good solid two days of vaping, but it's huge. I'm a server, so I used to keep my ego in my apron. Well, with the lavatube that isn't feasible. Even in my pants pocket it was just, well... big. And I like my Kgo VV just fine, but aesthetically it's not too pleasing, and I hate the button. Also it's a 650 mah battery and doesn't last very long. SO, I got an eGo Twist and I love it. I rarely vape above 4.8, so I'm totally fine with that being the cut-off point. I almost never vape anything at or above 5 volts. The Twist hits hard, it's a 1000 mah battery, and I got it in stainless. It looks pretty. And best of all, it fits in my pocket and apron again just fine!
I say go with the Twist, if you haven't already made the decision/purchase. Use it, save up a little for a Lavatube. Or if you can save a little more, go for a Provari mini.