The Coolaboratory Liquid Pro is a lot different from other thermal compounds and you have to make sure that you want to use it because it bonds to the CPU and Heat sink and makes it extremely difficult to remove. Unlike thermal paste or regular compound that is easy to remove and clean this stuff is not. I did not find the temps all that much different and while they may have been a bit lower I did not like the trade off of not being able to remove the heat sink without damaging the CPU lid.
Artic Silver 5
Timtronics
These are a couple of the better compounds.
If you o decide to go ahead with the Liquid Pro it would be a good idea to watch the video on how to spread it as it is very hard to do.