Who makes the best gas tanks?
^^This^^ I've had one on my Dart for several years with no issues.
The biggest problem I've seen with aftermarket senders is the gauge reading. It'll be right at empty and full but not in between. Most aftermarket senders read linear while factory units read on a curve. For instance let's say the range is 70 ohms, 10-80, most aftermarket senders would read 1/2 at 45 ohms while a factory sender may read 1/2 at 20 or 50 ohms. This will cause the gauge to be off anywhere in it's range except empty or full.