re: Got a Penn Battle 4000 reel.....need some rod suggestions

Fluoro leader for sure. 20# and brand doesn't matter as much as make sure you get fluoro leader material as opposed to just a fluoro line you plan to use as a leader. They say the leader is a little tougher. You can do a straight braid to fluoro knot which you can get online or you can do a small swivel to join them also.

Also, you can get fins on Amazon.