There are several places to browse and research.
We have a couple of vendor websites that carry a good selection to start pricing.
www.reefgeek.com has a good selection - www.hellolights.com
reefcentral has several threads on different types of lights and different ideas and opinions.
I currently run a 6X54w t-5 set up on my 90G and am very happy with it. You will hear several pros and cons for every set up - research and research some more and pick what you will be happy with