It seems like most of the Renas work well, but it doesn't seem uncommon for them to be noisy and/or leak. I've heard the same reports with Fluvals; some love them and some don't.
I think the biomedia made it through OK; I had just cleaned the filter a coupla weeks ago so it wasn't too funky. I put the biomedia in a bag in my HOB
, and the tank is sparkly and the fish are happy. Will be testing every couple days to make sure there's no drama.
Thanks to everyone for your support and comments, and I'll report back when the new impeller is installed!