you can get these
SAMSUNG Spinpoint F3 HD103SJ 1TB $110
GIGABYTE GV-N560OC-1GI GeForce GTX 560 Ti $230 w/ $20 MIR
and even bump to 8Gb ram (combined w/ the 1Tb, will be very helpful for video editing)
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 $42
just have to swap out a few things to recover some cost
BIOSTAR TZ77B LGA 1155 Intel Z77 $100
Rosewill Green Series RG530-S12 530W $50
I went w/ that mem & board since you won't be OC'ing the non-k i5, and that PSU is better (80+ and true-rated high temp), will be more than enough....
System Type: 1 physical CPU
Motherboard: Regular - Desktop
CPU Socket: Socket LGA 1155
CPU: Intel Core i5-2400 3100 MHz Sandy Bridge
CPU Utilization (TDP): 90% TDP
RAM: 2 Sticks DDR3 SDRAM
Video Card 1: NVIDIA GeForce GTX 560 Ti
Regular SATA: 1 HDD
DVD-RW/DVD+RW Drive: 1 Drive
Fans
Regular: 1 Fan 80mm; 1 Fan 92mm; 2 Fans 120mm;
Keyboard and mouse: Yes
System Load: 90 %
Minimum PSU Wattage: 315 Watts
Recommended Wattage: 365 Watts
should be exactly $800 on the egg's cart

just add shipping for some of the components (well worth it) will be a nice build.