I just recently bought one too and
highly recommend this (link below). Notice that it's the 2018 version. It's confusing looking at the other colors as the bells are different, so they may be more modern versions. I got the white one, with the flatter bell with holes on the top, and notches on the sides. There's a helpful button to slide when removing the shaft that works like a charm. The low setting is plenty for my 6 lb batches. It's solid, and worth the $40 I spent on it after only buying cheap ones. Best thing is, my soaps are so much smoother with this stick blender - even other people has said they look creamier - and I haven't changed my recipe so I guess there's been minute air bubbles that didn't manifest as true bubbles, but just something that's smoother.
https://www.amazon.com/gp/product/B079NXBWDR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1