Damn, another? I remember when I was damn impressed by the Hero2 and was really considering buying one. Even visited stores just to take a look at one and chat with the seller. I bookmarked a site that sold them at the lowest price.
Fast forward couple of months, I try to open the bookmark and the store says that they don't sell them anymore as there is new one available. That kind of resets my lenghty Consideration Time (tm) and I have to start the process of considering the purchase all over. It was still in consideration untill this day.
It shouldn't take you long to consider this one, just look at the new features:
"HERO3+ Black Edition. 20% smaller and lighter than its best-selling predecessor, it delivers improved image quality and powerful new features geared for versatility and convenience. SuperView™ is a new video mode that captures the world’s most immersive wide angle perspective, while Auto Low Light mode intelligently adjusts frame rate for stunning low-light performance. Combined with 30% longer battery life, 4x faster built-in Wi-Fi and a sharper lens, the HERO3+ Black Edition is the most advanced GoPro yet."
If you can't afford the Hero 3+ Black you could go for the silver at £279.99