A few days ago VMware released the new version of vSphere 6.0 Update 3. – As you would expect this version also contains some awesome patches for vSAN, which will make it more stable and more performant. – see the ESXi 6.0 U3 Release notes! Great stuff. – But take care there are dependencies. As there are currently two release tracks of vSphere (6.0 and 6.5) which are updated regularly – there are slight differences in vSAN versions and sometimes you cannot easily upgrade from a vSphere 6.0 version to a 6.5 version if you are using the latest vSAN versions of 6.0. – Sounds confusing? – Yes it is somehow.
And it is right now. If you are going to update your vSphere 6.0 to U3 today – then you will have to wait for vSphere 6.5 U1 if you want to upgrade to 6.5. – and a possible release date for 6.5 U1 is somewhen in summer or autumn? – This means if you plan to upgrade to 6.5 before summer, you should not update to 6.0 U3 today.
vSphere 6.0 vSAN 6.0 released March 2015
vSphere 6.0 U1 vSAN 6.1 released September 2015
vSphere 6.0 U2 vSAN 6.2 released March 2016
vSphere 6.5 vSAN 6.5 released November 2016
vSphere 6.0 U3 vSAN 6.2+patches released 24 february 2017 **
** If you want to update to vSphere 6.5 you will have to wait for 6.5 U1
I hope this helps for your upgrade planning!