Questions about watercooling

[vaconcamp]

So I'm probably going to build an new comp. soon with these main components:
i7-3820
HD 7970
Corsair 600T Special Edition
and an x79 regular ATX mobo (don't know which one yet).
I won't be doing any overclocking and will do lots of 3D rendering and modeling and some heavy gaming. I was thinking about doing a watercooling build because of my previous overheating problems with most of the computers I've owned. So really my questions are:

for my purposes, is watercooling worth it?

what will the price difference be between an air and water cooled build?

how much of a temp. difference will there be?

is it quieter than air cooling?

and is thermal paste needed on the processor when installing the waterblock to the cpu?

Thanks in advance.

 

[bigcyco1]

Watercooling cost allot of money rather it's worth it or not only you can decide read the watercooling sticky it will help you understand it all and answer your questions http://tinyurl.com/73tkccb