ChrisO IMHO i would go with your Hitec Lynx 3d, and a standard option xxx-s. That way you can purchase a high end stock or mod motor(this is a must), high end ESC (definately need this), and a high end servo(dont need right away, but a great upgrade), which you will all need to race competetively.
Do you have any batteries? If not, consider looking into some high end battereis also, because you cant race if you dont have battereies. The newest thing is the 3300 gold peak batteries, those will last you a long time in a race.
The XR2 will seem like nothing compared to you Lynx3d.
Hope this helps you!