I bought a brand new MVE and a ABS tank, think it is made by MVE. My MVE 20 week tank for 500 bucks was the best investment. I have not had a lick of trouble with it.
I think that the MVE tanks are some of the best buys. Sometimes you can get a good deal through your semen distributor. I know that the person that fills our tank usually has good deals when we are looking for a new one.