They certainly look cool but as others have said, you should be able to find a number of less expensive options.
My wife wanted low voltage halogen track lights in "her" garage which gives a nice white light. I will make a few changes in the next garage design but the garage does look nice.
Couple of questions to consider for lighting:
1) What kind of light do you need in the garage
2) How much light will you need?
3) What color light do you want?
4) Will these be your primary work lights?
5) Will you install the lights or will someone else do the install?
Even with good light, I just bought a dual light 1000W halogen work light for spot detail light. Awesome garage heating system for the winter as well. Best $39 spent in a while!