I've been using the Swashdrive compact for everything this week and it really does handle anything amazingly well. There is some vibration with it. But it's not bad at all.
I've owned all the machines you mentioned and would have to say the compact is head and shoulders above the others. Unless you don't use carts.
If you're using standard needles, I'd go with the gen8 as an all 'rounder with the V3 a close second.