mmk, well I believe its time for me to upgrade my card~ my current card is Radeon HD 4890 1GB. Main reason why I want to upgrade? well I am currently playing Tera and my frame rate drops in open areas on max settings....and being a graphics wh0re, I don't wanna lower the settings down.

I am gonna go away from ATI series for the time being and try out the Nvidia series~ when I first made my build, my friend was recommending a Nvidia card but I followed a forum member's advice and chose the ATI. Not that I regret that decision~ but I just wanna try something different.

my comp specs are as follows:
Tower: COOLER MASTER RC-690-KKN1-GP Black SECC/ ABS ATX Mid Tower Computer Case - Retail
Motherboard: ASUS M4A77TD Pro AM3 AMD 770 ATX AMD Motherboard - Retail
GPU: SAPPHIRE Vapor-X 100269VXLE Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
PSU: COOLER MASTER RS-700-AMBA-D3 700W ATX12V V2.3 SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC Power Supply - Retail
CPU: AMD Phenom II X4 955 Black Edition Deneb 3.2GHz Socket AM3 125W Quad-Core Processor Model HDZ955FBGIBOX - Retail
RAM: G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Kit Desktop Memory Model F3-10600CL8D-4GBHK - Retail
Internal HD: Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
I want an upgrade for the card to a GTX series. My budget is between $100 and $180 (highest I can go). I want the GTX series that will also meet my Power supply threshold as well.

any recommendations are appreciated.