Of course, I will have to stop this thing when I use the computer for graphically intensive purposes 
When I started mining, I had the same plan. What happened is that it made me stop doing graphically intensive stuff
I have another machine in the basement which blew it's power supply. I can put a "spare" overclocked 460GTX card in it. I just might make that a project as well
This mining this is rather addictive You got it.
But there are worse things you could be doing than saving the world from the perils of centralised fiat currencies controlled by meglamaniacal banksters.