Re: what would you show !!!
I'd go for a Rhododendron or maybe a evergreen Azalea 'cos I couldn't grow and show my Japanese Flowering Cherry, (Prunus Shogetsu, syn. Shimidsu) which we have in our garden.
It's fully grown now after 20 years and it's takes your breath away when it's in flower!
I think I've got a photo in my album here.
The Rhodies flower afterwards and are my second-favourite flowering plant/shrub/tree. stevmk2