I prefer hardneck. I generally stick with Music since, aside from a couple years ago, I use cloves from the previous year for planting.
Are you still harvesting? I've still got probably 25-30 lbs on the vine on my eight plants.
I generally don't weigh my tomatoes before processing, but I've filled 10 gallon bags with cored and seeded tomatoes at an average of 5.5 lbs per bag. That makes a nice amount of sauce over the winter, and the seven pints of smoked salsa I made a couple weeks ago with those things is worth every bit of the work that goes into going from seed to fruit!