Loki...that pH of 7.8 is pretty low. I had a pH of 8.1 for a while that concerned me a little and so I started using a product call Seachem Reef Builder which raises the pH to 8.3 and then can be used as buffer to maintain that. I'm thinking that your alkalinity isn't right for your pH to go that far astray from proper reef levels, so you should also get a good alkalinity test kit if you don't have one and maintain your alkalinity levels. That will help in maintaining more constant pH levels once that's taken care of.
As for the lighting you buy... the 130 watts of power compact lighting should be good for you the way you're planning the tank with the coral up high on the rock. I would recommend though, that instead of the 65-watt 10,000K and 65-watt actinic, you get the two bulb fixture with two 50/50's. The 50/50's are power compact bulbs that have half 10,000K and half actinic...you know what I mean, I'm sure...
pc bulbs have two sections. With 50/50's, you'd get a more even coverage in the tank of the higher Kelvin bulbs thoughout the tank instead of it being concentrated only under the one 10,000K bulb on one side of the tank.
Also, IF you have room for a small fixture in addition to the one you're getting on top of the tank, maybe you can add one for a wee bit more light. Take a look at
www.ahsupply.com
They specialize in power compact lighting and they're very reliable...I've used them and they can help you with ideas for additional lighting sometimes. Just a thought.