Choosing the best Version

Good Morning,

I'm currently running ESX 4.0 Update 2 across both my UAT and production environments.

Over the next few weeks I plan to move to a more recent version, either ESXi 5.0 Update2 or ESXi 5.1

I always try to work on the basis of being one behind the most recent version, therefore I was planning to opt for ESXi 5.0 Update2.

Would there be any real benefit of moving to ESXi 5.1 instead of what I plan to do?

Many thanks