I love my immersion blender, too! I had two in the beginning that burned out - Cuisinart, but they were weak (300 w I think?). Got a replacement for the first, but didn't bother after the same thing happened. I also had a cordless - liked the convenience, but that just didn't have the power; hopefully, they've improved them. This last one I got is a Viking - one of those 500 w, SS models a lot have now, and I also got the mini processor (hardly used at all) and whip (used that a lot more) with it. It's about 15 years old, with little signs of wear.
Something I really like to use this for, besides the usual things, is making Thai curry pastes. I learned early on that Food Processors don't do these very well, as some tough things, like chili skins, can bounce around in the container for several minutes, but still not grind up. The Vitamix grinds it up very smooth, but needs a little extra water, to circulate. With this, I put all of the ingredients in a 2 c glass (one from one of those burned out blenders does best!), and just start pushing the blender up and down, until it is blended somewhat smooth - much like doing it in a mortar by hand, but quicker!