Have a look at the new Penn Squall SQL 15. It has an adjustable magnetic casting brake. Set half way I have had no over run problems and it handles fish well. I have caught smooth hounds to six or seven kilos and a bunch of kahawai with it. Mark Roberts had a cast with this reel on a 12 foot Penn Prevail surf rod and had good things to say too.
This is the reel that supercedes the Penn 525 Mag.