What is your favorite piece of hardware that you

I would have to say the video card. With out it I couldn't immerse myself in an awesome game.

Either my card because it's a beast (GTX 680 DirectCU II TOP), or my case. Truth be told though I'm getting a little tired of the case, still love it just ready to do something new.

For a LAN i love my CASE. it's the original Coolermaster Sniper with the handle on top. I also love my Dust off Keyboard Quiver.
I like my Keyboard (Logitec G510S), but it's lack or USB's on it really make me sad when i'm warm and can't plug in my Silverstone USB Fan...
for everything else i really enjoy the quickness of my SSD. Patriot Memory 128 Gig with quick boot-ups and the ability to run as much stuff as i need with no lag.

It's a tie for me with my LG 27" LED monitor or the MSI GTX 760 Hawk video card.

The LG monitor was an xmas present last year and I love having all the screen real estate with the 27".

The MSI GTX 760 Hawk is a great card that will run any game with good performance but didn't break the budget. Plus the cooling of the MSI Hawk series , similar to the Twin Razor card I have as well , means it can keep its cool on a long day of gaming.