I'm an owner of a shiny-new PC. It's my first build, so I'm still really new to the whole 'customize anything and everything' aspect of it. The only cooling I've added to the rig is that which came with the parts I bought for it (Two case fans, the CPU fan/HS combo thingy, and the fan on the GPU.). Should I be concerned about overheating, would it be a good idea to plunk, say $30 down on some extra case fans, and what (free) tools can I download to help monitor the temperature of my components?