I have not tried the G25, but great things have been written in this forum about the G25 as well as the DFP. I have a PS2 - no PS3 yet, so I cannot comment on wheel compatibility with the PS3. Generally speaking, both the G25 and the DFP are top of their class with the G25 being more expensive but also offering a more realistic experience due to the better configuration and more robust materials used, the separate six-speed gated shifter and metal gas-brake-clutch pedals. Be careful though, not all games support the added functions of the G25 - yet. I drive the DFP. I'm very happy with it and will never go back to controllers. With the DFP you gain much more control and "feel" of your car, in every aspect of racing, which the controller simply cannot match. Lap times will improve. 👍
Be warned - one thing will lead to another! I got the GT4 disk as a gift about 6 months ago, then bought the DFP, then bought a fantastic cockpit, then a 50" HDTV, then a 5.1 audio system, then a ButtKicker, then a new racing seat, then gloves, shoes and recently, a Vox racing helmet (yup). I need help! Talk about obsessive immersion!! Help me!!!
ERacer
Edit: I think I'm experiencing a mid-life crisis. On the bright side, at least I'm not buying a real Porsche for my garage.