The bait runner is a great reel if you look after it.
A little confusing as to why you'd buy a baitrunner for casting as its not the best of casting reels and is designed for fishing baits both slab and live, hence, the bait runner feature which allows the fish to run without feeling any pressure.
The guy in the tackle shop was correct in saying that stiffer rods are better for casting off the beach when looking for distance. The Penn Prevails are a good rod, although not very stiff. In in experienced hands and can cast over 100m when used correctly.
Corb