Not sure about red sunset or brandywine but I know the other three get just as big as most large maples such as tridents. If you are looking for something a little more exotic (and smaller in size) that will withstand full sun exposure I recommend Fireglow (which is a Japanese cultivar). It has a nice red color all summer, not only has a great fall color (with shade of reds and orange tints) but has a excellent spring color with matching if not better bright reds. It also only gets about 6-10 feet tall being way smaller than the ones you mentioned. You can find some good images by doing a google search.

Backyardgardener.com is a good site that has a lot of info on all of the above mentioned Maples and is very reliable in its information (link posted under link URL).

Here is a link that might be useful: Back Yard Gardener

Trident maple is not a large-growing (60'+) maple. Red and Freeman maples are.

'Fireglow' I would not count on to remain only 10' tall. That is not even out of the shrub size range. True, Japanese maples are slow-growing. But if one of these eventually exceeds a space there is no attractive way to whack it back.

Amur maple might suit your purposes. The main thing I have against use of it in my area is that the spent fruits often persist on the tree for a long time. I don't want to look at dead brown junk for months, one of the main reasons to plant a deciduous tree should be its winter aspect.