The G27 or any of the Logitech wheels are decent entry level wheels. I started on a borrowed DFGT then bought a G27 which I used for almost a year before I spent the money for a Fanatec.
Looking back, I wish now that I'd waited until I had enough saved to buy the Fanatec or a Thrustmaster from the start instead of wasting a year on the G27. If you are not sure you will stay in sim racing (don't waste money on a good wheel if all you want to do is play GT5/6) then go with the G27 or one of the other Logitechs.