I use TrackIR (got it for Arma 2 but found out you could use it with ETS) and Logitech G27 racing wheel
I would definitely recommend the DFGT! For the price you pay, there really isn't anything that comes close!
I Bought TrackIR not to long ago, I recommend it and if you get it.. I hope you enjoy it as much as I do!. I got it mainly for ARMA2. Also check this out here. saveing up for the Oculus Rift 300$ for onePretty expensive setup there! A G27 and TrackIR are on my wish list
I use a computer?