I think the Logan 9" lathes are under appreciated. Those Logan 9x17s don't take up much more space than an Atlas /Craftsman 6x18 but are heavier and more capable. They can be found with a QCGB, so even without one can be added if you can find one. The 10 and 11" Logans use the same gear box, but not sure if the 9" used the same or had their own unique gear box. Scott Logan is active on the has FB and IO groups Logan groups, and you can still get many parts.
I don't have a "need" but if I find a 9x17" South Bend or Logan with a QCGB at a reasonable price it will come home with me.
Edit to add I half agree with Mr Whoopee here. I would say QCGB is highly desirable, but not a deal breaker. However no change gears on a change gear lathe, you need to make sure to factor that into what you pay because acquiring a complete set can add hundreds of dollars to your final cost.