For me, Sean Connery is the only Urquhart I've known for the past 40 years.
I can understand the comments about how the actual man himself would be a more meaningful subject, rather than the actor who portrayed him in the movie, but at a commercial and practical level Connery is likely to sell many more Busts than Urquhart himself. I don't blame Young for choosing the Connery version, I think it's a smart commercial decision.