The RSST is a rebuildable, much like the Nimbus Clone you have pictured in your first post. It's a combination rebuildable + tank, so you get the best of both worlds, but it can be tricky to setup at first, so if you're not yet ready to do rebuilds I'd stick with glancing over the others mentioned.
You can check out the Protank II at the link below (good company to deal with):
Kanger ProTank II
With the Protank you'll get 2 pre-built heads (the unit which contains the coil, wick etc) which screws in and out of the base. I have 6 of them and while I no longer use the stock heads (I rebuild these too), they are one of the better bottom coils.
You can check out the Vivi Nova at the link below (also a good company to deal with):
GotVapes VISION ViVi NOVA 3.5ml V2.5 REBUILDABLE TANK [gv-VIVINOVA-TANKV2.5] - $12.95 : GotVapes.com, E-cigarette Supplies - Atomizers Cartomizers Mods Juice and more
The main differences, other than the Protank being a bottom coil design and the Vivi Nova being a top coil design are the tanks themselves. The Protank is Pyrex (glass) and the Vivi Nova is plastic. Why does it matter? Because certain juice/liquid can crack plastic, such as citrus, cinnamon, and some mints. If you vape any of those, you need to get a tank that has a glass enclosure.
Another bottom coil design that is pretty nice is the Vision Vivi Nova:
Aspire BDC Vivi Nova Pyrex Tank Stainless Kit
The above is stainless steel + pyrex with a window, bottom coil design and it works pretty darn good.
The only thing you have to worry about with those 3 tanks (other than plastic being prone to cracking) is replacing the heads which is as easy as screwing off the top or the base, unscrewing the existing head, screwing a new one in and then letting it sit for a few minutes before you vape.
What is rsst? I've been googling all day trying to find these tanks. The tank I have on is cooler than the one I had before which was a basic clearomizer (I think). I'm new so I'm not really ready to start building these things yet. Anyone got a link for something they think may keep mine streamlined and minimalist like it is now? I'm getting more into the aesthetics at this point but everytime I use mine it's just irritating as all hell.
I'm realizing that a lot of these questions could be answered by just going into a smoke shop, but those places are off limits to military on this island so my options are volcano, the kiosk that sold me this thing or the Internet.
Thanks for all the help guys.