Coscto has an Anova immersion circulator kit that comes with a polycarbonate tub and fitted lid. $149 after $50 off.
I have this one, but it was $1300!!! LOL I usually do a couple hundred pounds at a time through it tho. I wouldn't give it up for the world. My buddy has the exact one you are looking at it, he loves it. It's great for 1-2 steaks, much more than than and it gets to be a bit of a struggle to keep temp.
I have the 800W Anova. I bought an 18Qt Cambro clear plastic container with the lid and cut a hole in it for the circulator. I can do a 6-lb prime rib in that with no problem.
Tip #1: Walmart has 1.5 or 2 gallon ziplock bags that work great for big pieces of meat. Tip #2: If you have trouble with meat floating after removing the air, stick a couple of dinner knives in the bag with the meat.