I need a new computer

Hey guys after my comp I'm using encountered a derp its slowed down to the point of not being able to run much of anything.

Basically ill be needing a new computer asap. I figured that you guys would know more on computers so I'd like some help picking or making a new one if you have any suggestions. The basic specs id need are as follows:

If you can suggest separate parts, that would be fine too because I may build my own.

- desktop
- $800 or so
- 8 gb ram or
- good graphics card, but not really over 200$
- 1TB harddrive
- Probably a good processor- A decent soundcard
- Network card?
- PSU that won't fry everything in the case
- Fairly quiet, but some noise is ok

Any help would be appreciated. Thanks in advance.