Chronograph is essential. As far as QL, if you're dabbling in wildcats and other cartridges that don't have a lot of load data floating around, or if you want to find alternate powders (as suggested above) then QL is very useful indeed. However, if you're, for example, loading the usual suspects (.223, .308, etc.), for which there is a lot of collective wisdom floating around, and you just intend to use a popular powder for that cartridge, I not sure if it'd be worth the money.