Damn, those tracks and driving physics seem really interesting. Too bad you can't have 10min test drive before buying because I'd like to know how the driving feels. For me LFS feels very natural but too "perfect and sterile" at the same time, making driving little too predictable. On the otherhand GTR and rFactor don't feel natural and it's like having a big flashing sign saying "IT IS A COMPUTER GAME" on top of your monitor. However, tires feel better than in LFS, especially lateral grip.
...Oh well, I guess I either have to lock my creditcard in a box and trow away the key or get a job.