You've got a LOT of searching to do, Spect! There are so many different ways to setup and run a viv...and just as many people who will say that is the "best" way. Half the battle is knowing what species you want to keep, and then building the viv around their requirements. You've picked auratus, which I believe are pretty terrestrial, so you'll want to go with something that has really good length and/or surface area to give them maximum territory and movement.
Here is a German link (via Google translation) that has some good information...even monthly rainfall:
http://translate.google.com/transla....&u=http
They do their hunting on the ground, but still love to climb and tend to sleep in the upper areas of the tank, so you are looking for a viv that has the best of both worlds. A standard larger size aquarium would work well...you could probably do a 55 gal tank, but I think a 75 or 90 gal would be best in providing more surface area and a bit more height. A 40 gal breeder might even work depending on your space and budget. They are much more active with high humidity, so I would look into rigging up a mister via DIY humidifier for cheap, like this one:
http://www.frognet.org/gallery/JasonW-humidifier-setup
Then there comes the entire design of the viv, and this really comes down to personal preference. I would just spend time doing some research on different peoples' sites and seeing what appeals to you. There is the popular false bottom design, or just gravel, or using LECA (little water absorbing clay spheres) with maybe a pipe used for siphoning water, or just a layer of peat moss and leaves where you can just scoop it out when it gets nasty and replace it with fresh. I think it really comes down to what you're looking to do as far as maintenance and certain aspects of the viv. If you want a water feature, false bottom is nice. If it's pretty terrestrial, just a basic peat bottom may work best. You may be thinking something like this with a lot of plants:
http://www.poison-frogs.nl/e03.html (scroll downt the page for his first viv) or something more simple like this:
http://www.frognet.org/gallery/Dilshad-Khan-90G (personally, one of my favorites for terrestrial species).
As far as plants, I would suggest trying out plants from a local Home Depot, Lowes, or garden center. Pothos are pretty popular, but again it will take some reading around on various sights and seeing what people are keeping and what they've had success with. Some may like more stagnant, humid air...but some may need some circulation to keep from molding away. A lot of it is trial and error. It might help to chech out some viv suppliers and often they will have little descriptions and requirements of plants (
www.fantasticfrogs.com www.blackjungle.com).
As you narrow down what you want, it can be much easier to help out with specifics. But others can throw in their experiences and what has worked for them or what hasn't. Hope this helps you out a little.