NEED MORE LIGHTING!

[impreza]

i am in NEED of more lighting. On my 20g, i have 64W of power compacts on it. I have been reading about work horse ballasts and VHO and NO and all that on RC lately. I am VERY confused. If i get a WH5 or a WH7, should i be running a VHO or a NO setup? i saw some URI VHO bulbs that r 24" and 75W each. I was think that if i ran both of those i would have 150W of VHO, but what is the differnce between running a VHO or a NO setup on a WH ballast? What is involved in making this kind of setup with a WH ballast for my 20g?
can anyone design and recommend a proper or ideal setup for me for my 20g? its 24" long and 18" high. I want to keep softies, zoo's, and some lps and an anemone. I wanted to go MH but i have read that it is better for larger applications.

What is better VHO or NO? on the britelite website, the philips bulbs r MUCH cheaper than URI VHO bulbs, if there a major difference?

WHat is the most economical setup? i dont want to pay LOTS more for VHO if there isnt much of a difference. Is it possible to keep SPS without MH?

Can someone guide me through the process of building the best setup for the best price?
thanks!!