Better LC kits for new system?

[JeffnWV]

been outta the loop for a long time and looking for opinions on the best liquid cooled kits for a new system. I have a koolance EXOS kit in my current rig but it never seemed to offer and increased performance capability over the air cooled setup I had before.
I opted to keep the exos because of the sound benefit. I'd like to use a lc setup in a new rig but only if it can provide a notable increase in stability if I tweak the speeds.

[h20-ski]

Anandtech is doing a round up of heatsinks, and they are noticing an increase in overclock the more efficient the cooling. There are better watercooling kits out there, but if you are happy with a mild overclock the EXOS will do.

[JeffnWV]

Originally Posted by h20-ski

Anandtech is doing a round up of heatsinks, and they are noticing an increase in overclock the more efficient the cooling. There are better watercooling kits out there, but if you are happy with a mild overclock the EXOS will do.

No, I am looking for something better and that's why I was asking. Only reason I kept the koolance in was because of the noise reduction. I am looking for your opinions on the better/best kits.