my F90BT is currently on 2.006. I am looking to upgrade to V3 but I am not sure which one to go with. I see from posts and screenshots that the modded 3.0 seems to look like windows CE or similar but I am not clear whether the modded 3.0 is an improvement to the official 3.0 or something different.

 

Also, is it possible to buy a used official V3 SD card (ie someone used it to upgrade their nav) or no?