The 650D does indeed require a pass through to connect front USB 3.0s although you could get an adapter (which often comes with your motherboard) and use that to connect to the header on the motherboard. If you don't have one, I think you can get one for under 10 dollar in stores.
Something like this will work too.http://www.newegg.com/Product/Product.aspx?Item=N82E16812176003
I recently got myself a 650D and I have to say it looks better than I expected. The only thing I don't like about it is that the side window sits too low, so you can see your PSU (which is not interesting at all) and the bottom half of your memory and CPU cooler.
Other than that it's great and has nice features.
EDIT: or as I mentioned above, get one of these adapters http://www.highflow.nl/behuizingen/behuizingen-toebehoren/bitfenix-internal-usb-3.0-adapter.html,
which is a more practical a clean solution.