I use the bigger (15 pc) set at the drill press, the smaller with hand drills(electrics)

I ran a woodshop before I retired, which is why the large set. For he average guy the 1/4-1.5set should be allyou need

Remember though- a forstner and a hole saw are different things. Hard to do a flat bottomed hole with a hole saw;) That's what Forstner bits really shine at.