if your running your q series quad core at stock then absolutly. if its already running at 4Ghz, then you are probably fine. although the i5 will open the card up a bit more since you will be able to overclock it, as well as the gpu.
I built my friend a pc with an i5 2500k and at stock speeds it had similar performance as my q9550 @ 4ghz, its like I've had an i5 for years before it came out . Of course I'd OC the new cpu anyway, so I will still get more performance
i really wanted to go socket 2011, but damn its expensive for what you get and not worth it for gaming alone. I wanted to get a ton of ram and use ramdisk.