By combining Colbalt with Emerald, the membership component also from MintJoomla I have a solution that improves on all of the best features from the previous MightyExtensions Components.
Colbalt is a fully blown CCK and as such is not for newbies who are probably better off sticking to the excellent but non-comparable K2. However if you have a bit of web dev experience with Joomla! then I recommend you give Colbalt a try.
The new pricing structure means the core Component, Plugins and Modules will always be free, allowing me to pay for only the premium features I need. The good news is that licenses are no longer restricted by domain and premium purchases can be used on infinte domains.
I believe that Joomla! 2.5.x has been a important milestone for the Joomla! community and a big step forward. Along with the recently announced roadmap for Colbat 8 with exciting new Enterprise features the future is looking very promising.