Want to do suspension..

Definitely get the torsion bars! I did Torsion bars, sway bars, UCAs, LCA stiffening plates, Bilstein RCD shocks all from PST. No more bottoming out or wallowing around in corners. As stated before, you don't have to do all that, but if you can, you will likely be happy you did. Also, if you have to chose 1 over the other, I'd recommend torsion bars before sway bars.

Cley