Hello, guys! Help me please to do a right choice.
I can buy:

Razer Abyssus (old) for 30.5 USD
Razer Abyssus 2014 for 48.5 USD
Razer DA 2013 (gayest Word of Tanks edition) for 88.5 USD
Razer DA Chroma (10K DPI OHMYGHOD MUSTBUY xD) for 104.5 USD
Logitech G100S for 23.5 USD
STEELSERIES KINZU v3 for 48.5 USD
STEELSERIES Kana v2 for 58 USD
STEELSERIES Rival 62271 (6500 dpi) for 72.5 USD

What would be the best? I play UT99/2K4/3/4; Q3A/QL; CSGO; HL1/OF/HL2DM.
Now I have some A4Tech X-718BK (Avago ADNS 3080) and the only thing I don't like in this mouse is prediction.

Thanks.

Mouse are shit. My left button died in just 2 weeks.

Of course membrane one.
Now I have some indecently cheap CHERRY KB-0556 that costs me ~$5 few years ago. And it's time for a replacement. I don't spend much time on games now so I decided to pick some of the best cheap membrane keyboards instead of mech ones for $150-200+.
Any ideas? Mitsumi Classic? Some microsoft or?

And just bought some new 2014 Abyssus.
For CS:Source/UT2k4/HL1@1080p which dpi I should use? I like high/medium sens.

Now I know only that constant, fully locked FPS is good. But how much is enough? I can see a huge difference between 60 and 125 on my 60Hz monitor. Also there are difference between 125 and 300, in CSS for example, I've binded fps_max with different values to test and found out that 300 feels smoother than 125(and also screen tearing are almost not noticeable with 300fps without vsync), despite of my monitor has 60Hz refresh rate.
So I'm pretty confused with that. Which FPS to set?