Don't dive head first in and buy an expensive pyrex tank without knowing if you'll even like cartos. My advice buy a Boge F-16 tank, buy a 5 pack of cartos try them, after you know you like them keep the F-16 and buy a nice Pyrex tank. That way if you don't like them you aren't out much money.
Just my 0.02 cents.
Just my 0.02 cents.