Hey RS,
From the beach its hard to beat braid.
Look for a 15 or 20 pound test, smooth finish like a Daiwa Samurai braid and uni-knot a 6 foot section of clear mono as a "top shot".
Terminal knots are simple with mono and you'll also enjoy increased abrasion resistance and just a little forgiveness in the form of mono's stretch when you're playing that big fish