[General Maximus]

you don't have any choice, the shub will automatically download the latest firmware revision. There might not be a noticable difference in the GUI but there will be a difference in the code relating to stability/security/something else. If you google it I am sure you will find a post by one of the mods on the VM forum. They always announce a release date in advance and the issues the firmware is going to address (e.g. in the past they released one to address compatability issues with voip handsets).