to your first post. Hard to tell it depends if you just want to cool your CPU. It's hard to tell either way, whether or not you decide to cool your CPU only, CPU and Chipset/CPU and GPU or all three.
to your second post. There is no link so we don't know which block you are talking about. And yes you still need to apply some type of TIM
I suggest you read the stickies and search the Watercooling section to get an idea of what everyone is using, what we recommend etc.