HELP! Janome vs. Juki serger Sewing Machines Parts and Sales in Los Angeles

Hi all! I got a Janome MyLock 204D for christmas and have been given the opportunity to return it if I like something better. I had my eye on the Juki MO654DE model. This will be my first serger, but I’m not really looking for something I’ll want to upgrade from in a few years. I know A LOT of people love their Brother 1030, but honestly I’m not interested.

I’d like input on these models in particular but feedback on Juki and Janome sergers in general would be greatly appreciated. Thanks!