Keep the wheels. I hit a Volpe of a riding partner who pulled out in front of me (long story) at a good clip. The wheels on the Raleigh I was riding at the time were thrown way out of true, the front one at least, while his rear wheel was only barely thrown out of true - and it took the brunt of the hit. He was about 200lbs at the time.
Basically, yes, don't worry about the wheels/tires. Same guy also has a Bianchi Giro roadbike, and says he doesn't tell "that much" difference between riding them.