If you're looking to buy, then buy buy buy and fix it for 5 years because by the time you settle and sign loan docs etc the rates would have most likely dropped again...
It's tinny on startup and it makes a puffing noise when you rev it a little so I can understand the perks of a thicker wall. But XForce is cheap and plenty of 10s have been run with em.
My car vibrates like hell from the rear at 100+kph and has only done so since Ford replaced my diff bush and the other two bushes either side of it. Would you think the vibration is from the different bush or could it possibly be the bearings as mentioned above?