I love the IDEA of SS tanks, I've just never been able to bring myself to use one, because even though I intellectually know that well, I will "know" when the liquid runs low and well, I still dread giving myself a dry hit absentmindedly.
You might look for RTAs with a mostly metal tank and a "protected" juice window so to speak. I don't have one coming to mind, but I bet they are out there. I have a totally wicked Oddessy not an RTA unfortunately, but it's got about the smallest still useful juice window and the best protections I've seen yet, there are metal cages you can get (often after market) that will provide protections.
Unless you can't stand the idea of it, (and I do not use tank cracking juices) I've often found some of the non glass plastic and etc. options to be the best (for me). Oh I always start out with the glass tank and the best of intentions but I'm usually RELIEVED by the time I'm replacing it with non glass, frankly, because if there is ONE thing I know, it is that I will eventually break a glass tank. I'm always looking for non glass tanks of whatever sort (or cages and etc.) and sometimes I buy them WHEN I get the atomizer, if one is not included.
Anna