What are your current options these days if you'd want one of those? I was leaning towards the Griffin or something similar for my first rba tank, but I know from my metal Vivi Nova how annoying it can be to not easily see how much juice you have left to work with. I'd also want something that would not crack from the more troublesome juices. Are there any cheap alternatives, or is it just the $100+ devices that would provide you with all of this?