Upgrading Vcenter and Esxi from 5.1 to 5.5 or should I go to 6?

Im running vcenter 5.1 and esxi 5.1 1065491 at the moment. My hardware are mostly HP DL380 G7's and G8's which I have confirmed on the HCL.

I would like to upgrade but i wondering should I go to 5.5 or straight to 6?
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Make not of possible Veam issue

If it was me i would upgrade to the stable 5.5 for a while.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
At present we are recommending the following:-

1. New Installations - move straight to VMware vSphere 6.0, of if you require 6.0 features, and your hardware is supported.

2. Current user of vSphere 5.0 - upgrade to  VMware vSphere 5.5, check hardware is supported.

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