Badmouth: I dont play any sims and so honestly, I dont know if i can tell the difference. can you tell me an easy way to tell the difference? Right now im hooked on Battle Gear 3 and the more i turn the wheel the harder it feels (still easy tho) and when drifting, if i left go, the wheel snaps back. 
Ant2: i have two comps (my personal and cabinet) my personal is phenom X4 945 and my cabinet is a phenom x6 1100t with a 7850 so, your i3 should be able to play with tweaking. im using the lastest compiled pcsx2 from git 1.3.0. I set the preset to two or three and the only changes i make is I make the VU clamping mode to extra (otherwise the cars fall through the floor) and I turn on multithreadingVU in speedhacks(for 3+ cores), that made the biggest difference. You can also also decrease the sound quality, it same song over and over anyways. I can play at native resolution perfectly and I can do 2x native with very small dips (mostly at launch)
Twistedsymphony: So far, any game that official supports logitech wheel has worked so, theoretically, all theses games should work. 
http://en.wikipedia.org/wiki/Logitech_Driving_Force_GT    007: Nightfire (cars only)
    18 Wheeler: American Pro Trucker
    4x4 Evolution
    Auto Modellista
    Battle Gear 3
    Burnout
    Burnout 2: Point of Impact
    Burnout 3: Takedown
    Burnout Revenge
    Burnout Dominator
    Colin McRae Rally 3
    Colin McRae Rally 04
    Colin McRae Rally 2005
    Corvette
    Corvette Evolution GT
    Driven
    EA Sports F1 2001
    EA Sports F1 2002
    EA Sports F1 Career Challenge
    Enthusia Professional Racing
    Ferrari Challenge: Trofeo Pirelli
    Ferrari F355 Challenge
    FlatOut
    FlatOut 2
    Ford Mustang: The Legend Lives
    Ford vs. Chevy
    Formula One 2001
    Formula One 2002
    Formula One 2003
    Formula One 04
    Formula One 05
    Formula One 06
    Gran Turismo 3: A-Spec
    Gran Turismo 4
    Gran Turismo 4 Prologue
    Gran Turismo Concept
    Grand Prix Challenge
    Grand Theft Auto III (cars only)
    Grand Theft Auto: Vice City (cars only)
    Hot Wheels Velocity X
    Hot Wheels World Race
    Hot Wheels: Stunt Track Challenge
    IndyCar Series
    IndyCar Series 2005
    Initial D: Special Stage
    Juiced (video game)
    Juiced 2: Hot Import Nights
    Jurassic Park: Operation Genesis (cars only)
    Knight Rider: The Game
    Knight Rider 2: The Game
    Lotus Challenge
    Midnight Club II
    Midnight Club 3: DUB Edition
    Motor Mayhem
    NASCAR 06: Total Team Control
    NASCAR 07
    NASCAR 08
    NASCAR 09
    NASCAR: Dirt to Daytona
    NASCAR Heat 2002
    NASCAR Thunder 2002
    NASCAR Thunder 2003
    NASCAR Thunder 2004
    NASCAR 2005: Chase for the Cup
    Need for Speed: Hot Pursuit 2
    Need for Speed: Underground
    Need for Speed: Underground 2
    Need for Speed: Most Wanted
    Need for Speed: Carbon
    Need for Speed: ProStreet
    Need for Speed: Undercover
    NHRA Championship Drag Racing
    R: Racing Evolution
    Rally Championship
    Rally Fusion: Race of Champions
    Richard Burns Rally
    RoadKill
    Sega Rally 2006
    Shox
    Smuggler's Run 2: Hostile Territory
    Starsky & Hutch
    The Simpsons: Hit & Run
    The Simpsons: Road Rage
    Total Immersion Racing
    Test Drive Overdrive
    Test Drive: Eve of Destruction
    TOCA Race Driver 2
    TOCA Race Driver 3
    Tokyo Xtreme Racer 3
    Tokyo Xtreme Racer: Drift 2
    Total Immersion Racing
    Twisted Metal: Black
    Twisted Metal: Head-On
    V-Rally 3
    World of Outlaws: Sprint Cars 2002
    World Rally Championship
    WRC II Extreme
    WRC 3
    WRC 4
    WRC: Rally Evolved
Although this list is incomplete as I have listed games on my list that arent on this wiki, this is because of Jap or euro only games or older games that well there no official place to find information on. For example, I could not find Battle Gear 2 info anywhere but after googling the ps2 cover, that back cover mentions the older GT FORCE wheel.  
as for ones that surprised me to have no support at all, the ones i can think off right now is
Outrun 2 :C2C (the Japanese version Outrun 2SP does have support tho)
Dirt Track Devils (original an Model 3 game, no idea why they didnt add wheel support)
Tokyo Xtreme Racer: Zero (TXR 3 and Drift 2 have wheel support but not Zero)
Motorstorm: Arctic Thunder (understandable since it works best on Dualshock but, it would have been nice)
Ridge Racer V (another big surprise. The reason why is because it was trying to promote its own special negcon controller. Google it if you dont know it, its worth learning about)
Road Rage 3 (Touge 3 [Japan]) (Initial D style game. I really wish it had wheel support, it actually a rather fun game no one knows about)