Ok, so you seem like you have your heart set on getting the GoPro. Just keep a few things in mind about it, though:
1. It records to a compressed h.264 format, making color grading harder and making your picture worse. Most cameras record to a compressed format, but some compressed formats are better than others. You'll see the term h.264 flung around a lot, but not all h.264 is the same. Look up example footage of your camera and see if you like what you see! Youtube is aplenty with GoPro Hero 3 Black footage.
2. It uses an ultra-wide lens which has a natural fish eye look to it. You can edit fish eye out of your videos, but you may want to look that up and see if you're willing to do that (I don't know what it entails or what it looks like post-edit). You can't make review-type videos with all fisheye, your viewers would get nauseous.
3. Your GoPro has no settings to modify aperture, i.e. you don't have a natural bokeh effect. Depth of field helps when trying to place emphasis on something in your shot. For instance, you would be in focus and your background would be slightly out of focus, naturally drawing the center of attention to you. Plus, bokeh just looks sexy.
4. The GoPro is BUILT for rugged, rough and tough use. For your intended use, you're not getting the most out of it.
5. You have limited control on exposure settings with your GoPro meaning it's harder to expose for different lighting situations.
On the gear you chose:
Mic: Look up reviews of that mic in action. It looks like it will be awful, haha. Make sure it sounds OK before buying any microphone ever. Plus, I'm not sure what kind of automatic gain control the GoPro has going on, but it likely will introduce a "hissing" sound in your audio if you plug that sucker straight into your GoPro.
Tripod: You picked out a pan-head tripod. These are among the worst types of tripods but the cheapest. You probably want a fluid-head mount tripod if you're doing video. It allows for smooth camera pans and motions. Look up the difference! This is a really good budget one: http://www.amazon.com/Magnus-VT-300-Video-Tripod-Fluid/dp/B005GMWNY8
The reason I'm being super critical of your selection is because I don't want you to buy all this stuff and be super unhappy with the quality of your gear and then immediately want to upgrade. I think the Go-Pro will probably work (and it has some REALLY awesome frame-rate/resolution choices) but the gear you chose to supplement it is pretty bad.