Should I upgrade my HK 3.0 LC to say an email supremacy? I've had this block a long time and custom painted it myself to match MSI gaming motherboard. Before you say yes, it still cools good and I idle around 30 with 5930K @ 4.4, games in low to mid 50's, and Aida 64 lower 70's.

Sounds like this upgrade would only be either for looks, or because you've got money burning a hole in your pocket. It doesn't sound like you actually need to upgrade, but that doesn't mean you won't do it. 

Kendragon

sethleigh
Sounds like this upgrade would only be either for looks, or because you've got money burning a hole in your pocket. It doesn't sound like you actually need to upgrade, but that doesn't mean you won't do it. 

Ok smart alec! LOL! Do those numbers sound on par with todays water blocks? 

Check out this review of the HK IV. It's less than 1.5 C better than the HK III, which you already have. How much is less than 1.5 C worth to you?  :-)
 
Honestly I think you're all set. If your money really is burning a hole in your pocket, though, maybe you can add a radiator, reservoir, pump unit with fancy top, or some fans? If you're really determined to spend some money, I'm sure you could get more real improvement out of other improvements than from going from the HK 3.0 to the HK IV.