You don't need watercooling for that CPU with reasonable overclocks. My E8400 at 4.15GHZ is happy with a Thermalright Ultra Extreme (TRUE) at around 33ºC above ambient (say 53ºC) on full load. If you're aiming for above 4.5GHz then maybe watercooling is an option but a lot depends on the particular CPU you get, some overclock with ease others are disappointing. It's definitely not worth spending a few hundred on a watercooling setup for a less than 10% sustained increase in performance (at best).
Are you 100% sure all those watercooling components will connect with the correct fittings/barb sizes? Also are you sure a triple rad will fit in that case without you having to resort to a Dremel? If you're building the loop yourself and the parts happen to fit together make sure you do at least 24 hours leak testing with the loop outside the case.
It is a very nice case but the price you've quoted seems a bit expensive.
My TRUE setup is actually quieter and just as effective as my watercooling loop. I have to have the fan speeds on high to get the fluid down to a decent temperature. Admittedly I only have a dual rad in my loop.