I have the Grand Mozart's. I agree that they may have a softer high-end and may add some mid-range bloom. With the right amp its just a touch.
I have to also agree that they have an amazing soundstage. Highly musical with pretty amazing detail. May have less than some in the highs but you can listen for hours.
Also you need a high current amp. I would also look for more watts than your receiver. I have older Exposure amp with high current and 90 watts a side and they absolutely sing. I agree a better amp is in order. Think bigger power supply. Most people who don't like these speakers don't have enough current.