I for one have been looking forward to the GA release of 6.5 and unless you have been asleep for the last day you can now download it with ease. I know a few people had issues with the download links at first but it appears to be plain sailing from now.
If you want a few reasons or want to know whats new check out these two articles
If you want the download links here they are
Some great other resources including step by step guides if this is your first time installing vCenter from scratch 🙂