Old Starfire Grognard.  Just picked up SAE with ISS and H&C.  Love them, especially love the history for H&C.

I loved the old Starfire campaign stuff. 

I have looked at VBAM demo and it looks kewl!  However, is it worth the purchase?  What all will I need?

The thing that bothers me is...do I have to buy Starmada X as well? 

In other words am I going to have to convert rules twice to use the VBAM stuff?