If you like driving games with physics, you should own the wheel. It is completely other dimension in comparison to controller.
The problem is, because of greedy Microsoft and Sony who decided to code force feedback and charge wheels producers a hefty amount of money for decoders, today there is no decent unexpensive racing wheel like DFGT.
The cheapest good racing wheel is Thrustmaster T300 RS (but make sure it has 3 pedals block), which is not cheap at all. Logitech wheels have old gear based technology wich is inferior to Thrustmaster belt driving, and priced just a little less than T300 RS