We came in February with 20kgs each and no where to live. This time last year I was in meltdown panicking about it all!
In hindsight I wish Id brought less clothes, as there are so many car boots, table top sales, charity shops etc that theyre so easy to replace.
I wish Id brought more personal bits and pieces instead and some basic kitchen things like scales, cake tins etc which are dearer here.
Some airlines let you bring your laptop as extra hand luggage, worth checking.You shouldnt have any problem with the electrical items, they only see to care about items that receive info, like tv's.
The visitor box is a great idea, we've gradually had a few bits brought over by family and it is nice having a few bits to make it feel homely.
The whole experience did show me though how little you really need to get by, and all the worrying just wasnt warranted.
Good luck! Relax and just look forward to it x