Basically Golf Bushes have a slight split in them as standard I think this is to make them a more comfortable ride. However the split is prone to splitting the whole bush.
TT bushes are solid, so are a lot more durable, these are a common upgrade for all Golfs. I have just done this myself.
Then the Whiteline Anti Lift Kit, in my opinion is a good bit of kit but I won't get the extra £125 worth of use out of it so its not worth it to me personally, but have been advised its a good handling option if your thinking of a few track days.