I think any of them would look good colorwise. I only have Durandii and HF Young but they are not very large plants yet. I love the flowers on HF Young, so that gets my vote.
Julie

Yes, all the above mentioned varieties would look great combined with Julia Child ... also consider 'Juuli' and 'Blue River'.

'Juuli'
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'Arabella'
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Terrance

Those are gorgeous too. I read somewhere that Arabella is a bit more sprawly so I think I will go with HF Young for that spot.