MICA - I have lots of clemmies, but not an expert. I impulse-buy most of mine. I do know there are some that tolerate full exposure better than others. And there are differences among the overall size of the plant and its growth habit: some grow tall, some are just right for a trellis, and some grow short & squatty. I have a few that prefer to ground-creep rather that use a trellis. Then, as mentioned earlier, they are categorized buy different "pruning seasons." But I'm lazy so mine all get pruned at the same time
They come in soooo many varieties & colors to choose from. I like the ones with the largest blooms (though I think the "bloom" is a modified sepal and not the flower ....?). Might want to choose the characteristics you want (include your planting zone) and plug that into a GOOGLE search.
And don't know if this was mentioned, but after the "blooms" die off, they leave these attractive little seed puffs. So it's almost like 2 plants in 1.
Let us know what you end up with!