I've had good results with Hatchbox and AmazonBasics.
I've heard good things about Hatchbox PLA too. Monoprice's stuff is good as well, and if you're on the West Coast, it's usually delivered within 2 days.
I can warn you off on Shaxon brand, though - that's what I'm using right now, and when the roll is gone, I'm getting something better. It's really brittle when it's cold (and I'm not talking extreme temps - high 50's/low 60's Fahrenheit) and I've had it break off inside the tube to the hot end, multiple times. It's just not a good product.