here is some suggestions that are all available @MC
they have good deals on i7 and motherboard bundles- the hyperthreading of the i7 over the i5 will come in handy for video editing if you find yourself doing that often -if not than do an i5 bundle:
Grand Total (pre-tax) $304.98
(its 289.98 after rebate)
Intel Core i7 4770K MSI Z87-G41
since the i7 (and i5) has graphics on it (igpu) on it and the motherboard has HDMI connection, no needto get a graphics card. also it will be very, very low wattage so no sense in getting a big hinking power supply so this will do fine:
Builder Series CX430 430 Watt $39.99
again if doing video editing, the more RAM the better, still you might want to get 16Gb if you are heavily multi asking in various audio programs or have large files open:
Ballistix Sport 16GB DDR3-1600 $139.99
now for storage; SSDs are cheap and most will be great so i just found an inexpensive 240Gb that will be plenty to hold all your programs and operating system with room to spare.
M500 Series 240GB $134.99
but that won't be all - programs such as photoshop like to have a separate "cache" drive for working files:
Black 1TB 7,200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive WD1003FZEX $79.99
BUT oh noes! we aren't done yet. there still could be a need to store all the media, media and more media!:
Desktop Mainstream 3TB IntelliPower SATA 6.0Gb/s 3.5" Internal Hard Drive WDBH2D0030HNC-NRSN Add to Cart to see price
(i did ad to the cart and i believe it was ~$90)
now you have to burn your work to a disc, right?
ASUS DRW-24B1ST Internal DVDR/RW Burner - OEM $19.99
ok, that puts the total @ $810 but if you want a
blu ray burner you're looking at $860 w/o a case (which can run from $20 to $220) and an operating system that would be $100 to $140.
these are all suggestions to help you get an idea what you may want to consider. i am assuming your audio interface is USB 2.0/3.0 compatible so i forego the sound card.
hope it helps.