I wrestled for a while during the early to mid 80's and I did a few Greco tournaments too, they taught me a lot.
However I don't know many people who can continue to wrestle 20 years down the road. I have been training in Judo for 22 years, and I am just getting started.
If you want to do a sport that teaches throws, and you want to go to the Olympics, it's a toss up. However if you are looking for an art that can literally improve you as a person for a lifetime, then the answer has to be Judo.
Besides, though both teach Throws, only Judo has actual finishing moves, meaning that if you were to use it in a fight, unless you goal was to throw and pin, which I don't recommend in most cases, wrestling is not a very good answer.
Good Luck with your training.
May your way be Gentle.
Russ (The JudoGuy)
The JudoGi Store www.judogis.com