You probably should consider practical issues too. Are they vegging in the same room as they'll flower? That could mean dismantling a load of fixtures, and banging new hooks into everything to change to flowering lights. MH is still the best for veg and HPS for flowering. If you've got the money, space and ventilation, ignore the cfl's.

Remember, heat is an issue that needs adressing with these kind of lights, so you may need to fit that in your budget too.