The NEBOX is a great small tank/mod combo, you might want to youtube it. Temp control, goes up to 60 watts. Comes with premade coils, 2, a Ni 200 and I think a SS. So it's really good for temp control. It's my favoriate device out of all of the devices I've seen, definately the best choice for a smaller setup, and I think you'd really like it.
If you've seen the NEBOX, you may want to KEEP seeing the istick mini by Eleaf. It gets to looking absolutely halarious, but not in a bad way, in the BEST way. If you want to laugh, vape, and love, you really need to get a good mini tank they have one that is suggested specifically for the istick mini. I forget the name, but I believe it was mentioned above. I think but I'm not sure, it's the GS16 recommended by the Administrator that posted up above me.
The Genitanks r cheap if you haven't heard of them, but the material is also cheap. The Aerotanks are I have heard a good replacement for the genitank in specific, and you might like, like an Aerotank 2 or 3 or whatever, instead of the genitank. But you might prefer the GS16, I don't know of too many other devices that are small and stealthy other than the NEBOX.
In fact, that should be suggested since you're looking for the ultimate smaller and stealthy device. This is your thread and the God's have answered your plea!!!! Get the NEBOX!