I've used both Exo-terra's and Zoomed's, and I personally preferr Zoomeds. They're just better looking, if you ask me. They come in 2 thickness' and they have the standard 2 meter-version and a 20-meter bundle.

http://www.t-rexproducts.com/products/forest-landscape-series/bio-vine-thick/

http://www.t-rexproducts.com/products/forest-landscape-series/bio-vine/

If you want to know what they look like when in a terrarium, here's some pictures of my own: