You could use the (2) VHO
tubes you have with (2) Coralife aqualight kits. That would be about the bare minimum light for soft corals and some LPS
. You would have to Keep the bulbs fresh to maintain intensity. I would change the bulbs every 6 months with this set up. The same applies t the (6) 96 watt set up. This may be cheaper in the short term but in the long run Metal Halide will be cheaper. Since you already have the VHO
you could pick up (3) CoralVue 250 watt MH
retro kits for $199 each and screw them to your canopy. Add Your VHO
Actinics and you are set for anything you want to keep. The MH
bulbs last for 9-12 months and are cheaper to swap out once a year than the PC
twice a year. Plus you have the lights that can grow with your hobby interest!
Heat may be an issue but with good fans in the canopy and one in the sump if you have one will go a long way to help keep the tank cool.