This sort of judgment is only possible with a lot more information and great pictures. You don't say what you paid for the first car either, though it sounds like a very nice car.

Its probably hard to justify changing the diff though. The steering on both cars will probably adjust so that it has no play as that is not much mileage on a steering box.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.