My ancient Tefal blender died a couple of weeks ago. It had the interchangeable heads: blender, balloon whisk or mini chopper. I used the blender and whisk frequently for soup, mayonnaise, Yorkshire pudding batter, whipped cream, milk shake, meringue, etc.
My first thought was another Tefal but I needed one immediately and couldn't get Tefal. I wanted a whisk attachment as well.
In the end I settled on a cookworks one from Argos, £25 because it had a whisk and mini chopper and a 600watt motor. So far it has blended 3 pans of soup, whipped cream, zapped strawberries and made allioli and tartare sauce. It doesn't feel as well made as my last one but it does the job.