I wouldn't bother.
You'll spend a fortune on it but you'll rarely get to play with (heck evening just transporting to the gaming table is a scary thought)
Unless your super rich and enjoy the buliding and displaing it's a waste of money.
Now if your not bad with modeling you can find templates online for "paperhammer titians" these templates allow you to contrust a full size titain out of cardboard and some plastic card. If you do it right you can have your very own titain for 1000x less the cost of a forgeworld one.
Hope this helps