Acer palmatum "Sangokaku" also known as "Senkaku" is perhaps the most famous for its winter bark colour, the colour goes really vibrant in the winter and tones down in the summer. They are rather fussy plants and you have to treat them right, I've lost a lot of Japanese maples, including my first attempt at growing Sangokaku. Though my present one is looking happier than any other Japanese I've grown before.

When you mention A. grosseri, it is usually A. hersi, which was previously considered a variety of A. grosseri, that people have in mind for the prettier bark - and that is the one that is more widely available. However they have now both been reclassified as varieties of A. davidii, though I expect it will take the garden trade a few decades to notice. Hers's maple seems to be an easy tree to grow, I shoved it in some poor soil gave it little help and it has done fine. Some careful shaping and pruning will help show off the bark. It does tone down in the winter.