iRacing.com Motorsport Simulations check it out
Mostly it is not the wheel that determines the speed, but the one touching the wheel thumb. Unless your pedals are spiking you don't need a new wheel to reach better times. Although a G25, like you mention is a wheel with amazing FFB feelings and will defenitly gives you more joy with your game compared to you current wheel!
http://www.iracingworld.com/kickapps/_Bristol-Silverado-footage/video/425048/57752.htmlhttp://members.iracing.com/membersite/member/statsseries.jsp
More @ Bristol! (Bring on the toilet bowl!)
I got iRacing this week and I was really skeptical about it, especially the cost but I can say it's worth every penny if you can afford it.
The cars feel like they are riding on rubber and you can feel the abrasiveness of tarmac....especially if you spin. There's also wind noise... and in cars which have downforce you can feel it increasing with speed. You can't take the chances in iRacing that you can with Simbin sims which adds to the realism.
The tracks are super realistic, makes Simbin look arcade.
It is very professional and weeds out the serious racers from the gamers.
These kind of mini reviews makes me want to buy (try) it more and more.. hehe
I have a feeling when I finish the current Evo league season I'm in I will be devoting 100% of my time to iRacing.