thank you for your help Grins i appreciate it, the corals seem to be doing fine with this setup but ill keep my eye out for any upgrades 
just for clearification: you said you have 28 watt t5s. those are normal output t5s which are NOT significantly better than PC. the kind which is a quality light are a decent fixture of the t5 high outputs. the 36" version (which i am assuming you have seeing hwo you are lookign to add 96 watt PCs) are 39 watts. the normal outputs are 28 and really arent much more suitable for handling corals than normal output florecents. if i were you, i would look for an upgrade.