You are a better man than I am. Mine always catches on the grass and gives me a deep gouge in the grass.I guess I'm different (Okay, no comments!). I don't care for the "groove" along my driveway and curb. I simply use my gas weedwhacker to do my edging. I run the cords parallel to the curb while walking on the street, and with a little practice you can trim the grass cleanly to the inside edge of the concrete. Looks like a brand new haircut from your favorite barber.
Get a blade model and get one with at least one adjustable wheel so when the blade wears, you can adjust the depth with the wheel.