Pump Advice

[snokrystal]

I'm planning to hitting up watercooling for the first time this summer, I feel confident I can set it up when the time comes. However I need some advice on a pump. My build will be in a 900d case cooling a 4770k to start off with one GFX card 670/680 with SLI in near future. I'm thinking in using 2x 360 radiators with a tube reservoir feeding the loop, unsure on tube ID/OD at this time but with a large case I don't want the tube to look to thin.

Now it comes to the pump I'm a little lost here. Would a D5 Vario Pump with a EK-D5 X pump top be sufficient to circulate the system? Any recommendations on a loop would be grateful.

 

[snokrystal]

Thank you for helping so far. I've decided to go with
ID 1/2" OD 3/4" tubing, nice and thick inside the 900d.
I would like to get this (XSPC D5 Vario) :-
http://www.overclockers.co.uk/showproduct.php?prodid=WC-141-XS
but unsure which top to use since I would also like to add the Bitspower D5 Mod Kit to the base of the pump to hide it. Can you guys recommend a good top to use with the XSPC D5 Vario that's compatible with the mod Kit. Also which fittings would you recommend to add to the top to allow me to use compression fittings for the ID 1/2" OD 3/4" Tubing. (I love the look of monsoon fittings but they don't seem to be on sale here)