you could look at shipping stuff but to take much more than what you have you will start having to pay a lot of money out
I think 2 x 20kg bags (remember you'll get a 10kg hand luggage and often a handbag too) should be fine providing you buy all your household items when you get there... remember these people filling up cars have duvets, pillows, bedding, laundry basket, cushions/posters/decorations, kitchenware, TV - all sorts of 100% not necessary stuff! Just try and do a practice pack nice and early and think carefully about what you take, be strategic about heavy items like shoes and think of alternatives where possible e.g. get a kindle rather than taking paperbacks if you like reading