Yup, all seems to be fine, shouldnt have any problems
Can i ask, what GPU are you hoping to add to that system, cos that is an awful lot of watts
Also, arianet are not the most reliable of PSUs, it really is best to go with a strong reputable make, after all you run the risk of damaging loads of components if it blows.
Good makes are Antec, Corsair, BeQuiet, Seasonic, XFX
I've just bought an XFX XXX 650W psw for my rig, theyre rebranded seasonic units, so some of the best you can buy.
In terms of wattage, i dont think you will need any more than 650W for that rig, and if anything it will give you a bit of headroom, aswel as being efficient.
Its also modular, so you can take off the cables you dont need, making the case tidyer http://www.scan.co.uk/Products/650W-XFX-XXX-Edition-Sin...
The yasya defo supports it, but its a higher performing cooler, and so costs more, so its up to you. On another note, the yasya is smaller and a touch lighter, so there are less space issues, but generally the mugen is fine too