Thermal Compound ?

[sms1202]

Should I get extra thermal compound like the IC Diamond or use the stock ones that comes with EK waterblocks ?

[1Scotty1]

Use stock or MX-4... from what I have heard, IC Diamond can scratch the surfaces

[CaptainPebbleDash]

The standard ones what come with EK will be better anyway but it's down to personal preference and opinion of what you've found to work best.

 

EDIT:- IC Diamond is perfectly fine to use, there was a bad batch previously before but I've had a few tubes and used them on different CPU/CPU Coolers and never had any issues with scratching. 

[Oshino Shinobu]

Just use the stock stuff. The difference between different TIM is only a few degrees at best, and the stuff EK includes is actually pretty good. 

[sms1202]

Use stock or MX-4... from what I have heard, IC Diamond can scratch the surfaces

Linus is always like IC Diamond or GTFO

[Senzelian]

Should I get extra thermal compound like the IC Diamond or use the stock ones that comes with EK waterblocks ?

The stock one that comes with the EK waterblocks is good enough.

At best you would see a difference of 1-2 °C. That's really not worth the money.

[sms1202]

Just use the stock stuff. The difference between different TIM is only a few degrees at best, and the stuff EK includes is actually pretty good. 

That save me $15 CAD(I am buying stuff from NCIX Canada)