Any good destruction racing games?

Well, I have been looking at a few car (and truck/motorcycle) games with good destructive properties, but I am unsure what is best. I really want one with fully destroyable tracks, cars, and world. One with both single track races, against multiple opponents, and the ability to roam freely about the city/country/world. I also want to be able to wreck certain things in-game to harm, or slow sown opponents. Different modes would be nice too, such as a competition mode, where you must race to the top, so to say, a free roam mode, a mose where you choose everything from the track, to how many opponents you face, and a mode much like that which you found in NFS Underground, where you normally freely roam, but you can go to certain places to spesifically race against other people on a track. Being able to choose your car is a must too, hopefully with the opportunity to customize paint, and parts (maybe even go to the extremes of car customability that NFS Carbon allows). I dont care too much about the ability to play others online or LAN, and the game must be playable on PC.

Flatout seems to be good with everything that I want except a free roam mode and car customability. The latest Burnout seems to have really good crashes in a free roaming world, but lacks single races, car customability, and very little of the world seems to be destroyable. And of course NFSU allows okay crashes and some destruction of the environment (Mostly for the pain of enemy racers, not much just for looks), with more than enough customability, and the many ways of play that I want.

So, anybody have suggestions?