With NAB just 3 weeks away, I would just wait and see. if they announce and demo the next version, you can decide whether the feature set is something you need and have a better idea of when it will be released.
I believe that upgrades should be motivated by features or needs. 5.5 was excellent software, 6.0 was great upgrade and completely worth it for the 64-bit capabilities. 6.5 is a great product, but unless you need better AMA workflows there isn't a ton of motivation to make the jump in my opinion.
ACSR Elite/Avid ACI, Apple Certified Technician
Consulting for Workflow and Digital Technologies at Comprehensive Technical Group