I was thinking about basically the same choices. I unfortunately have gone up a step since I started vaping, literally from the logics to a 650 mah eGo without a spinner, to one with a spinner and now to a iStick 20 watt about 4 months ago. I know other people have spent a ton of money on mods but for me personally its about saving money as well as health and I was only smoking 4 or so cigs a day when I switched so I actually feel like I am spending the same amount with all the upgrades. But, once again, the iStick 20 watt just isn't cutting it. I use a subtank Nano 1.2 ohm coil on it, and used to use a Nautilus. Problem is if I go back to the Nautilis, I start getting all sorts of atomizer short messages, etc. all related to the crappy 510 connection. So I don't really want a 30 watt iStick even though they fixed a lot of the problems because of the principle of it.
The Segieli 30 watt looked really nice to me at my local B&M (They were charging $70!) so I was thinking of ordering one of those online but I also saw the IPV mini at a store near where I work in NYC and that was pretty nice (also over priced compared to online). The only thing with the IPV mini is I would need to buy a battery and I know people recommend getting an external charger for those. I just really like the convenience of using a mini USB. I know it has that option, but if its dangerous in any way, I don't want to mess with it. The Hana looks really nice but I've never seen a price quote, I'm guessing its expensive. Oh, and the MVP 3.0 looks great too. But I am all about portability as I commute so I'm literally on the move every day, and not just by car, its cars, trains, planes, etc. Thats why the iStick was so good for a while. But I need something that can handle multiple tanks without malfunction, and more wattage so I can try the 0.5 coil for my Nano and/or try rebuilding finally on an RDA. It seems you can't really lose with any of these but any advice is appreciated. I also just found out about the whole diketone issue which is separate from this but frustrating considering everything I like now is some kind of milky flavor. But thats for another thread.