I'd just like to revisit this topic for a moment. I've just got rid of my E53 X5 and got an E66 745Li. The nav software version is 8.4.4 so from looking at the info on here it looks like I have a NAVI102 system. I therefore have a couple of questions:

1) Would upgrading to a 103 be a straight swap and what were the major changes from 102?
2) Am I correct in thinking that my 102 would benefit from an update to V32?