I'm planning to get back to competeing after 10 years off, but I'm completely out of the loop when it comes to trailers these days. 
what are the good quality trailers now? What do I stay away from??

Stay away from anything manufactured from 2020 to 2023. Maybe some companies returned to full force by late 2022, but parts are still tough to come by, and many companies still have a shortage of qualified workers. 

Same good trailer brands: Elite, Platinum, 4Star, *Bloomer

*maybe

I have a 2003 keifer built genesis, I love it and haven't had issues with it. Seems well built and has been very reliable for us