I like the ION ones:

http://www.ion-essentials.com/public/content/products/travelgear/boardbags/gearbag_68_kite/

Still need to put in extra packing to protect board and I use a high density 12m foam around the bottom and sides of board.

With bag, board, extra packing and 3 kites (no bars) - comes to 28kg generally. It will be too heavy if you put in bars, fins etc. I then do up another bag with bars, fins, harness pump, helmet, vest, one more kite etc - usually comes to about 22kg. I use the Dakine Split Roller for this - perfect for it. www.kitepower.com.au/dakine-split-roller-bag.html

I don't travel light, but nothing worse than flying to race and not having the right gear.

i am using the north quiver bag and the ion race tech single board bag.
both are pretty nice and most importantly protect your precious raceboard heaps :)