I recently started my first marine system, and due to my inexperience chose to use a 20 gallon tank to get started. The tank was used and came with a standard freshwater hood/light but I would like to get my feet wet with the building a reef. Obviously I will need a higher powered lighting system to do so but the question becomes, "How much do I really want to invest in lighting for a 20 gallon tank if I plan on upgrading in the relatively near future?"
Any insight on which lighting types/manufacturers would give me a decent bang for buck and those of which I might want to avoid?
Any insight on which lighting types/manufacturers would give me a decent bang for buck and those of which I might want to avoid?

