I have a Husq Designer Diamond and love it. I wanted the biggest hoops I could get. I love Jenny Haskins designs, and my Janome did not like them. The Diamond stitches them out great.
I was in a class where there were three Pfaff Creative Visions and all three of them had problems.
I think the main consideration, especially if you've never had an embroidery machine before, is to make sure you have a really good dealer close by who has embroidery classes. You will learn so much more with classes than on your own.
LeAnne