A little bit of friendly advice: you don't know what you're talking about
I'm not saying that because I'm mean, I'm saying it because it's true. You don't know what computer parts you want, so it follows logically that you don't know how to quantify what you want. Trust me and heedicalling, asking for benchmarks from the forums is useless. Tell us your max budget so we can get a better idea of what kind of hardware you could get.
You're right, I don't really know much about the computer parts. I just figured asking people to perform a task I would be doing regularly (and practically, of course) would be a good place to start.
Anyway, here's what I'm shooting for; a modeling/HD video editing/music making/rendering computer - and being able to play some games wouldn't be a half-bad bonus either.
My budget was about $600, but it looks like I may have to up that a tad. My brother, who has built his own computer and knows a fair amount of stuff about the workings of computers built one on PC part picker, which managed to come in at around $600. However, I may need to slightly upgrade my processor and GPU from what it was, by the sound of it. Here's a small list of personal requirements (tell me if any just won't work):
2 TB minimum HDD (no SSD, I don't have that kind of money)
Intel processor and Intel compatible parts - needs to be this, dual booting OSX and Windows
Minimum 2 GB video ram
Minimum 8 GB ram
$600 - $700 price range, if possible
Here's what I remember having on the one my bro and I built on PC part picker:
Intel i3 4340 (upgrade?)
8 GB ram
Gigabyte motherboard (I don't remember which one, but it was in the $100 ballpark for price, so I know it wasn't super low-end. My brother chose this one because of its compatibility with OSX).
Nvidia 650 (upgrade?)
NZXT case (220 I think it was?)
Corsair 430W power supply (this should be fine, unless I somehow exceed 430W rating with this build).
2TB 3.5" Seagate Barracuda (should be fine)
Some random Wifi card, basically the least of my concerns at the moment.
I might be forgetting something, but that's what I remember.