You can land good sized fish on a 6500, and if I could only have one reel to do everything it would be a 6500, but if you want a dedicated surf reel I would go with something a little bigger. You don't need a bigger reel to fight the fish, you need it to fight the surf. The waves and current in the surf are very unforgiving and most times your going to need a 4oz to 8oz spider weight just to keep your bait in place. Can you cast this kind of weight with a 6500 with 20# mono? Sure. Can you pull the weight out of the sand with it? Probably not. Than you have the level wind, all 6500's, except the CT models have level winds, the level winds not only limit your casting distance, but they are a disaster waiting to happen on the beach. One grain of sand wedging between the worn gear and the pawl can cause you to lose fish, break rods and reel seats, warp spools, and bend frames, and yes I have had all these thing happen with level wind reels in the surf. As far as going to a TLD, that's a big negitive. A TLD is a lever drag reel with absolutely no cast control ability. I would suggest any of the old school Penn reels that will hold 250yds to 300yds of 30# mono, squidders, jigmasters,555,545,535, 3/0 senators, long beach, beach master, delmar, seaboy, anything without a level wind.