Could you give a more detailed list of ALL your components? Including any external storage(Attached to the PC)?
A Good 650W 80+ Gold PSU can handle your current setup just fine, with wiggle room, but not much(maybe a few HDD's/SSD's and 2 PCIe x1 Expansion cards; IE Sound card, USB3/USB2 Expansion card(s) | PCIe x4; RAID cards). The powersupplycalculator(I used it as a starting point for buying my PSU's, dont really need to now) is a good referance, but remember to add 10%-15% to the total wattage calculated for rest-assure and expansion.
Some really good 650W(Plenty, if its 80+ Gold/Platiunum) 80+ Gold PSU's(Partially Modular/Fully Modular):
** = Recommended
* = Also recommended, but not over the latter
1) Rosewill Photon 650W [80+ Gold| Fully Modular]
http://www.newegg.com/Product/Produc...82E16817182323 $79.99 (As of 7/21/2015) **
2) Seasonic 650W [80+ Gold| Modular]
http://www.newegg.com/Product/Produc...82E16817151118 $99.99 (As of 7/21/2015) *
3) EVGA 650W [80+ Gold | Fully Modular]
http://www.newegg.com/Product/Produc...82E16817438026 $84.99 (As of 7/21/2015) <-- I dont recommend this one of the 3, which is the one you where thinking of buying, but its up to you.
The Power Supply's have a Total of 650W of available power(Before you say "obviously", let me explain how it *really* works if you dont already know, just incase):
12VSupply's power *Most* of the components( If im not mistaken, ATX12V Standard: Graphics cards, CPU, Motherboard, Case Fans, ETC), the 3.3V and 5V supply power to Devices like HDD's/SSD's, Most Expansion Cards, USB Devices, ETC
So its also important to not how the Total wattage split between the Different voltages is valued at. Even a perfect PSU, say a 850W, w/ 850W total wattage on the 12V rail, still wont have the full 850W available, due to power(W) being drawn from other devices like HDD's/SSD's/Expansion cards(Not Including Graphics cards, or any other Type of Compute card *generally*)/ETC. So its efficiency rating is very important, but so is its Voltage ratings 3.3V/5V/12V(Especially 12V, as it supply's power to most of the components).
The EVGA PSU is actually rated for 836W on the 12V rail, which is further off than both the Seasonic and the Rosewill both offering a total of +/- 5W from their advertised ratings/wattage.