Thanks for the suggestions there Shawn.
I've actually just recently purchased an X-Priv, which will cater for my 'portable' mod needs. EDIT: This is because my previous portable mod my Smok Alien broke, that mod feels very similar in construction to my GX350 which at time of writing is the only mod I have in hand, X-Priv is on pre-order.
3 battery mods, maybe I could be persuaded, I just like even numbered ones 2 or 4, I have a 4 battery charger and 12 batteries (realises this is also dividable by 3, carries on), and while its obviously only 25% less potential mah than a 4 mod and 33% more than a 2 mod... I'm not convinced.
With all that said, the T-Priv 3 I have looked at very closely, so I might just, buy one and maybe buy a 6 bay charger idk, how many batteries would I want, GX350 = 4x2 + X-Priv = 2x2 + T-Priv3 = 3x2...18 then again if it replaced the GX350 it'd only be 10 so I'd have 2 spare, actually that could work X-Priv = 2x3 and T-Priv = 3x2, but yeah would work perfectly with a 6 bay charger so, I'm holding off for that reason, quite like my 4 bay.
Gbox 200 is side screen, interesting thing though, 8ml juice with some sort of RDA? I should probably read more on it.
H-Priv I feel will have the same paint/durability problems of the GX350, Alien, all older Smok mods, it's also a dual so.
XCUBE 180 looks way too old, reviews from 2015? Ultra is nearly 2 years old, look if its a good mod I guess age doesn't matter, except older Smoks have that paint problem, so anything older than the GX350 by Smok I feel would be a risk there, regardless of how little the risk is, just the hassle of ordering it, then throwing it away if its no good.
I guess yeah this is the problem with the top mounted screen request, they're almost all Smok, wish someone else could do this.
I might need to give up on the idea.