A good basic set to get started with is the Craftsman Straight, Left, and Right. They go on sale all the time.
I forget who is the OE manufacturer for them, either Wiss or Midwest.
The beauty of getting the Craftsman is that when you ruin the cutting tips, you just go over to your local Sears and swap them out with a new pair under the lifetime warranty. I've done that a couple times. But make sure you get the real Craftsman ones, not the Evolv. Because the Craftsman are lifetime warranty, the Evolv are not.