x3Razer is overrated.I guess they made a good mouse, the deathadder, but i personnaly feel it's too light.Iv had a mouse and a keyboard from them and the quality of the materials they use is very low.As an exemple, i think the Razor Blackwidow is poorly made. (Cheap plastic for a 100$ keyboard)Would not recommend.
I can disagree on the DA 2013 being light, it's a great mouse for a reason.
Razer does make some shitty quality stuff (almost everything) but the ones that they make good, i.e DA 2013, Razer Megalodon, it's completeley worth it.
Also, the Blackwidow is pretty decent yet extremely overpriced, and since the keyboard section is so large, it really doesn't need to have a "gaming" tag next to it to make it a good keyboard, you can buy a 20$ Microsoft keyboard, and it'll be ok, as long as you like the way it feels, and it doesn't break after a 2 weeks, it's a good keyboard.