The local places that build decent wheels around here use beefier spokes, and also provide free life-time truing (barring accident damage). I would find out if they do something similar at that bike shop. If they do, it may be worth the peace of mind to know that the wheel will be fixed if something goes awry later. I found all of this out because I ride a vintage aluminum road bike that won't accept modern rear hub widths, and HAD to have my rear wheel built when the old one was dinged up too badly.
If I had a more modern bike, I would probably go for the Performance wheel myself. But I do most of my own wrenching unless it is significant wheel-truing issue (true my own wheels for minor deflections), freewheel, or bottom bracket issues (don't have the tools, and does not come up often enough for me to buy them so far). If you don't feel comfortable truing a tire every now and then, then I would get the LBS wheel.
Have fun out there!