Apart from Cams packages should I just go with the 1.98 ratio rockers and computer upgrade instead on my VU V6 ecotec Ute?

This is certainly another option to consider. The great thing about the rocker upgrade is that they're easy to install, well within the reach of a home DIY, coupled with the fact that they represent gains of around 80% of those associated with a cam upgrade. It's for this reason that they're a very popular upgrade