I'd look at as an insurance payment. A dry sump allows you to lower the nose of the car so it more stable at speed. There is less chance of dumping oil under the tires if you break a rod when you don't have 10 qts in the pan, and there is less chance of engine damage with a dry sump since you're feeding the mains with deareated oil.

If you save an engine, or avoid a wreck then you've paid for the dry sump system. There is a reason the big boys use them and a 8 second early B body is close to big boy neighborhood.