Mouse: I've seen a lot of great reviews and heard lots of recommendations for Zowie mice. SteelSeries recently released a Sensei RAW Frost Blue Edition that is white with blue LEDs. I personally use the Sensei RAW glossy edition, and I really like it.
Headset: Ozone Attack Snow Edition. I've used this before and I can tell you this is one of the best gaming headsets you can get for the price. SteelSeries also has, again, a Siberia V2 Frost Blue edition. I don't know about the quality of a Siberia V2, Linus said it's good for gaming but not for other things like movies and music, so it's up to what you are looking for.
Keyboard: Off the top of my head, a white keyboard: Cherry G-80-3000. Really basic yet sturdy mechanical keyboard. The aesthetics may not be the best, but I can promise you that its insides and structures are really solid and well built. It's relatively cheap as well. Another white keyboard: Tt eSports Meka G1 Combat White edition (I do not recommend this keyboard though). You can check out one of my posts and see what I did with my SteelSeries 6Gv2 =D