There are alot of improvements in version 6.0 and up. I would personally skip 6.0 (Buggy) and go straight to 6.1 or higher. I'm personally waiting for 6.3 to become mainstream because it seems to have the most "useful" improvements. We have been holding off upgrading customers from 5.3 to 6.0, but will start doing so soon as they seem to have ironed out alot of the earlier problems. In case anyone is interested here are some of the changes I've noticed in 6.3 so far.
Clicking Help in Aloha Manger takes you to a website with a searchable manual for FOH, BOH, and Backoffice.
Super User disabled unless SEC codes are for the dealer keys
Ability to set different colors for submenu buttons based on categories
Tableservice now has ability to create submenus through the panel editor just like Quickservice
Tableservice now has smart items/ smart select
Audit reports can now search by check number, has full screen, and can export to Excel
Quickservice now has Split Check
Tables can be labeled by number or name
EDC now fully supports 56k USB US Robotics modems
Delete payment controlled by access level
Etc…….