A word of warning, I think most airlines only give you 20-30Kgs for luggage, and charge for whatever you go over by (unless you are flying first/buisness or have a gold frequent flyer card). I have heard of some airlines charging $25 per kilo, which will rather quickly erase the price differance.

I am not trying to put a downer on the idea, but also don't want you to get a nasty surprise at check in.