Id I had the money I would help expand the research in ‘speed of light’ computing and graphene technology, so that we could get faster computers sooner.
Computers already operate at the speed of light.
Only if they use fibre optics. Otherwise it’s not light 
You’re right.
Even then, that’s faster than the speed at which they can decode the signal.
m41a pulse rifles that shoot slower than the speed of sound, but faster than the speed of light
30" 2560x1600 monitor
5870 1gb
8gb of ram
core 2 duo E8400
new motherboard
500w+ powerbox
1tb+ HDD
android phone
1080p projector
my own place
a nice car
the rest of my life
4x 2TB HDDs
2x 1TB SSDs
1x Eyefinity version of the 5970
6x 26" 1920x1200 monitors
( non PC stuff: a Hummer H2 and a DMC-12 )
… giving it to Joss Whedon to make a second season of FireFly 
Actually, a processor that uses light to operate has recently been invented. Expensive? Unbelievably. Fast? Exponentially.
I’d get a PS3. I hate not having a console.