Jason, I'm a little confused as to the bent cast iron comment. I bought a 4224b right after they came out. I have turned on it for close to a year now with no issues at all. I have a local friend with a oneway and he prefers my lathe to his for turning. The headstock is box shaped but a a cheap fix is a 4 inch extention. I have only needed one a couple of times. The only other lathe I was interested in was the Robust. Brent makes a great piece of equipment.
Vega lathes never get any respect around the creek. I have the 1553 with the outboard turning atachment. Very moderately priced compared to PM and oneway lathes. Made in the US if that is a big factor for you. They have models that go to 10' between centers.
Hope that helps.
Quinn