I passed my Q6600 to my wife's computer. She somehow manages to get all her work and gaming done with no complaints on that "obsolete" CPU.
Agreed. I also have an i7 Ivy and have zero complaints about performance. With 16GB of RAM and an SSD drive, I leave everything I use on a regular basis open all the time (Photoshop, Steam, Aptana, iTunes, and Firefox with numerous tabs opened). I just works, with no lag or hiccups.