ride quality isn't really affected by anti roll bars too much.
im 100% happy with the cars ride and comfort with the bilsteins. they are on a different planet compared to the crashy OEM suspension. i can't recommend them enough.
the standard sway bars are very soft - the rear feels especially soft and just gets dragged round by the front. its not very mobile at the rear. the golf does lean a hell of lot, even with better suspension so stiffer bars should sharpen things up nicely i hope. i went for 3 way adjustable type so i can try and suit it to what I'm after better.
I find that ACC in 'Sport' makes the rear come alive...you can really make it move. Add to this the more aggressive steering and it really livens up the chassis. But, it makes the ride a shade too firm on all but the smoothest roads.
I can see how a decent rear ARB would give the same effect, but without the ride harshness.
I think for my set-up, a bigger rear ARB, ACC in 'Normal' and some means of having the 'Sport' steering setting in 'normal' would be ideal.