I’ve tried quite a few brands and my favorite napa cabbage kimchi is by Kaesung Banchan and Kimchi Market - a small hole-in-the-wall on St. Andrews Place off Olympic Blvd.
Kaesung’s napa kimchi is also sold by the jar at Olympic Market, but it’s slightly cheaper at the Kaesung store and they sell it at different states of aging (very fresh for eating straight or aged/fermented for over 1-2 weeks if using it for a kimchi based casserole or stew).
I don’t have a picture, but the water radish kimchi is also quite good, but it comes in a huge jar so I don’t get it that often.
Besides various kimchi, Kaesung also sells some banchan appetizers. One I really like is seasoned perilla leaves.
Here’s a link to an LA Times article containing more info: https://www.latimes.com/food/dailydish/la-dd-kaesung-kimchi-koreatown-20140814-story.html
Kaesung Banchan and Kimchi Market
1010 S St Andrews Pl.
Los Angeles, CA 90019