I use the enamel canning pots and they work great. You do need to make sure that there are no chips, but if you are pretty careful with it, getting chips is unlikely.
It seems like most folks use stainless steel or aluminum, but I have had great success with the canning pots. They are far less expensive too so you can have some money to put elsewhere.
"It is sheer folly to be taken by the hand and led down the path of better brewing by someone who says that they know it all. No, it is your experience that counts most. It is your experience that will always lead you to more questions."