Are you looking to haul stuff, or arrange neatly?
If it's only the hauling, take the Ogio 9800 Hauler Bag:
http://www.rctech.net/forum/attachme...-12-43_833.jpg
http://www.rctech.net/forum/attachme...-14-38_354.jpg
I have one myself as I travel by public transport, and it's absolutely awesome. It's big enough to smuggle a person in your luggage, three midgets, or of course two cars, spares and most of my camping equipment for an RC weekend
(Note: The camping equipment excludes a chair and pit table).
So its main advantage is obviously the amount of stuff you can store in it (and yes it will still fit in your car, through doors)
Besides that it has a tough build and good stability and ground clearance, so it keeps on rolling where over grass and gravel when many RC haulers either unstable and tip over - which results in the sight of people carrying around a hauler (which I doubt is the convenient experience one hopes for when purchasing a hauler). I must say, it's also for the better that the Ogio bag keeps on rolling, because when empty it already weighs in at nearly 6.5kg!
If you like using boxes and bags to keep things separated and want a shipping container to carry it around, the Ogio should be on your list. If you want drawers and neat arrangements, ignore what I just said and get an RC hauler or Polybutler. Also, if you're still reading, consider that you'll be spending 150GBP on average (depending on the bag's styling/colours) if buy the Ogio bag...