Moving all the stuff

Hello,
I am wondering from all the folks that have moved from another continent to the UK: what did you do with all of your "stuff?" I have some electronics (a PC and a game console) and some clothes that I would like to take with me to London. Which is the most economical option of getting those there?

Sending it by US post seems reasonable, but are there any customs or duty fees on my own junk?

Should I use an international moving company for only a few boxes?

Should I pay a couple hundred bucks and stuff it into additional suitcases for the airplane?

Most of my belongings are getting left behind, but for the big price-tag items, I would like to hear from some other ex-pats. Thanks!