Upgrading from an HIS Radeon HD 7870 to a newer card?

[GhostsyofWar]

Some of you may have replied to my earlier post about upgrading and my power worries, this post is to get further input and to give more info, as well as get feedback.

APPROXIMATE PURCHASE DATE: Nov 2015 BUDGET RANGE: 230 Before Rebates

USAGE FROM MOST TO LEAST IMPORTANT: Gaming, Homework (involving Unity and Unreal 4)

CURRENT GPU AND POWER SUPPLY: HIS Radeon HD 7870 IceQ Turbo 2GB and OCZ 700w Modxstream
OTHER RELEVANT SYSTEM SPECS: ASRock 980 Pro3 Rev 2.0 motherboard with FX-6300 with Corsair H80i water cooler (Looking to upgrade my CPU to an FX-8350), 2 SATA hard drives, 1 CD/DVD Optical Drive, 1 Razer Mouse, 1 Logictech G510s Gaming keyboard, 1 x 120mm Case Fan pulling air in from top of case

PREFERRED WEBSITE(S) FOR PARTS: newegg.com
COUNTRY OF ORIGIN: United States

PARTS PREFERENCES: Prefer AMD Cards, Looking more to Sapphire then anything.
OVERCLOCKING: No
SLI OR CROSSFIRE:No

MONITOR RESOLUTION: 1920x1080

ADDITIONAL COMMENTS: None, other then worried about heat issues as this is all in a midsize tower.


First card under consideration:

SAPPHIRE NITRO Radeon R9 380 100384NT4GOCL 4GB 256-Bit GDDR5 PCI Express 3.0 ATX Dual-X OC Version (UEFI) Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202149

Second card under consideration:
ASUS GeForce GTX 960 STRIX-GTX960-DC2OC-4GD5 4GB 128-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121928

 

[GhostsyofWar]

According to my Kill A Watt monitor, I was playing Red Orchestra 2/Rising Sun. KAW recorded that I was only using ~250, jumping between 240 to 260 in there. Any ideas, it seems like that is a little too low, as it means my CPU is pulling about 95, and my GPU is only pulling about 160 to 170 or so. It just seems low.

EDIT: I just ran a short Prime95 and FurMark GPU test, as I don't feel like burning out my main computer, and the max pull it seemed was about 360w in total.

 

[Thunderballs]

http://www.ebay.co.uk/itm/AMD-Radeon-R9-290X-Reference-Design-4GB-GDDR5-4K-UHD-CrossFireX-PCIe-3-0-/321886261485?hash=item4af1ea90ed:g:eHQAAOSwKIpWFFle

Almost twice the gaming power of what you are looking at new. Will hold a lot of their value when you sell on yourself after you have had your fun.

 

[Thunderballs]

If your power supply is crap - replace it