One of the reasons I have not been considering a larger heavier lathe has to do with getting it into my shop. I bought a Laguna 14SUV Bandsaw a year or two ago. I had two other guys helping me move it. One was a power weight lifter. The machine got damaged somehow, maybe from leaning it too far, not sure. It did not get dropped or even bounced hard. My shop is in a basement that is under ground on three sides. To get anything down there the object has to go down around 15 steps, or around the house on some relatively rough hilly ground. Smaller objects can be moved with my small 30hp tractor in the loader. But the tractor's rear end will come off the ground if I try to lift more than a few hundred pounds with it, even if the object fits in the 5' bucket.
I have no idea how I would get a 500lb or more lathe into my shop. This is one of the reasons I have been thinking about buying a 300lb Oneway 1224. The info, I have says a Jet 1642EVS weighs 455lbs. Even broken down into pieces I'm not sure how I would get an object that big and heavy down into my shop. I was looking at Nova lathes vs the jets because the guy at Woodcraft was telling me it would break down into movable pieces and the box looked like it would fit in my loader.