The racing wheel would be the best option, usually a bit pricey when compared to controllers where you can find cheap alternatives for. Something to keep in mind.
The DS4 controller is better than any of the ones on here. Seriously, no contest. I doubt Sony would do a Drop though (or any of these other companies, for that matter).
That's not true, if your computer has a bluetooth card installed or you have a little usb bluetooth dongle you just download the drivers then sync it, simmilar to the PS3 or the Wiimote or any phone you might have.