Currently have a DNA... which is fine for me but thinking about an upgrade. Its between these 2 (like the M8 but don't want the size and wouldn't pay $200).
I do watch a lot of videos on my phone, so the larger screen of the G2 is nice. The waterproofing and newness of the S5 make me think I should just drop the 150 though...
I don't think 5.1" vs 5.2" is going to make much difference for videos. In everyday usage I think the screen sizes will be similar since the G2 is going to have on screen buttons.
The G2 was kind of a mid-gen phone so there isn't much difference honestly. And with its battery, it makes up for the greater power efficiency of the newest phones.
Is waterproofing, fingerprint scanner, and slightly better camera worth $150 to you? It's not much money either way - so it depends on whether you need the newest of not. I've used the fingerprint scanner and while it's not as good as the iPhone 5S, it works fine for me once you get the hang of the angle/speed it works best at. It's just not forgiving for angles or going too fast. But once you get the hang of it, it's fine.
The G3 is also a good choice if you can wait until July possibly. If the width of the phone isn't an issue for you, then it's definitely a compelling phone that focuses on display and thin bezels instead of features that not everyone uses (waterproofing, biometrics).