I'm about your size, and I have a 172.5 crank on my solo bike and a 175 on our tandem. I feel like I spin faster on the solo bike and pedal slower but harder on the tandem. That's pretty much what the normal wisdom is.

Since I ride both bikes regularly, I'm used to it. It's like my two cars. They drive differently, but I accommodate both without much thought.

As others have said, give each size a fair try, and then use the size that you like.