For a quality carto tank that wont break the bank. Check out http://www.ibtanked.com/ You can customize your colors sizes etc. They are glass as well so you don't have to worry about juice cracking tanks. I mostly use carto tanks for work. They are great, smaller chance at failure then a genny/rba etc. I use my Rba's at home. Once in awhile one of them will make their way to work with me. But the carto tank / Provari combo is just a grip it and rip it combo for me.