Acer Crimson Princess

Hi, just wondered if anyone grows this particular acer?
I'm torn between planting it in the border or putting it in a nice pot
My fears about the border
- it's very slow growing
- it's ( supposed to have ) a weeping habit
- it will be crowded
- if it's 'really ' weeping' , it isn't right for that place
Reasons to plant
- it will grow better out of its pot
- less watering
Reasons to repot
- if it's 'truly' weeping it will look fab
- it will get more