How good of a card do i need?

APPROXIMATE PURCHASE DATE: A Week Maybe? BUDGET RANGE: $175.00 Max After Rebates

USAGE FROM MOST TO LEAST IMPORTANT: Youtube, Mediocre Video Editing. Non-Intense Gaming. I play The Sims 2(not 3), Minecraft, Sim City(When its released). No desire to play FPS games. GTA occasionally. Dolphin Emulation is a must.

CURRENT GPU AND POWER SUPPLY: Building a new system, will have either a CX500 or CX600. I use an HD2400 Pro...

OTHER RELEVANT SYSTEM SPECS: i5 3470, 8GB Ram, ASRock Pro4-M Mobo

PREFERRED WEBSITE(S) FOR PARTS: I like Newegg...USA

PARTS PREFERENCES: None Really. NVidias drivers are easier to work with..

OVERCLOCKING: Highly Doubt It. SLI OR CROSSFIRE: I dont plan on it.

MONITOR RESOLUTION: I have a 1920x1080 (HDMI) and a 1440x900 (DVI). Ive always preferred to play games on the small monitor, but ive never had a system that could run the big monitor.

ADDITIONAL COMMENTS:...Not obnoxiously loud.

I have right now a 7850 picked out, with 2GB Vram...on Rebate its $150. But i know that 1GB is sufficient for most high end games, assuming your not running multiple monitors. And i don't play any high end games...and i don't plan on it. It seems to me like that card would be completely overkill. Should i go for a 7770 instead? That way i dont have to mess with a rebate, and i have a little extra money...which would be nice.

Thanks.