I'm still clackin away on my 5yr-old Razer Blackwidow v3 with green switches and loving it. If I had to replace it tomorrow, I'd replace it with the Blackwidow v4 pro with greens, without a second thought. But I LOVE noisy keyboards.
Used the Blackwidow V3, upgraded to the V4 and I was/I am happy with both. Both full-size, non-pro, non-X versions. Can't comment on the Huntsman, though.
If you can get the BW V4 at a decent price, I'd go for it. At a glance, I'm not sure the V4 Pro is worth the substantial extra cost as it doesn't seem to offer that much more over the non-Pro V4.
One thing I will say for both my V3 and V4 is that they never suffered from "mechanical-keyboard-itis" so far - unlike some higher-end products from Corsair and HyperX I've used before. Meaning: So far I've never had any issues with keys acting up on either of the Razer products - something that happened to all the other mechanical "gaming" keyboards I've used in the past.
Kirk_Van_H
