On the front a center punch really comes in handy for getting those holes where you need them, prevents the drill from walking.
The front upper made a huge difference in my opinion. I have the Autotech and steering is much more consistent through the turn, no midturn corrections needed like before.
EDIT: Autotech Front Upper

Eurosport Rear Upper (w/ custom decal I made, that blue one just wasn't cutting it)
