Not a big fan of that motherboard. Without knowing your budget it's kind of hard to suggest anything directly.
Everything else looks fairly decent. My suggestion is to look for a motherboard that will support SATA 6GB/S to get the best performance from that SSD. The ASRock Z68 Extreme3 Gen3 is highly recommended, and newegg will have some combo deals with i5 processors to knock off a few bucks for it.
As for a wireless adapter pick between a USB device to a PCI card. I suggest going with a PCI card since it will be a permanent option.
Great app for figuring out your power needs. You're around 350W of power use currently so you could get away with going down to the 400-450ish range if you will not be doing any Duel video cards.
That GTX 560 TI needs 2 PCI connectors for power so you'll need something that can support that. The CORSAIR Builder Series CX600 is a little cheaper than what you picked if you want to be frugal but not get screwed.
I have a Rosewill Green Series RG630 in my system that runs great, but there is not a lot of love here at Tom's for Rosewill
You can get a nice 80+ Bronze modular PSU for cheap unless prices rise ^^ http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Also with your budget allocation look to the HD 7850? Lastly for your wifi - is it wireless G or N and is the set up up and running with router/wifi modem and all?