Although the GoPro HERO4 Silver I posted earlier can currently be found for as low as $360, it doesn’t come with this bundle for the HERO4 Black that includes a 32GB memory card, plus an extra $50 to spend at Amazon. The surf bundle includes the same 32GB memory card, floaty, anti-fog inserts, plus surfboard mounts at no extra cost.
The HERO4 Black has higher resolution (read: 4K video) than the HERO4 Silver but no built-in touchscreen; for $100 less.
Thanks for the tip Michael!