For that amount your going to spend I would suggest that you can get a top of the range PC. There is no such thing as a bad PC, what gives PC's bad rep is the Help you get from the manufacturers support lines.
I would strongly suggest that you do as much research as poss. All PC's do the same functions However some are more specialized than others. For Example if your a serious gamer you will need a a PC geared to high ram memory super fast graphics card and good sound card. So know what your primary use of the PC is going to be then spec out a PC then do a comparison between manufacturers.
I personally like DELL some people don't because of there Help and support. But they are work horses not the fastest PC's but will run and run 12hrs a day every day without issues. Well for me at least no issues.
1. Know what your going to use the PC for
2. Spec it out by doing research
3. Ask as many people you can for their opinions
Also try looking at PCA's mag Best Buys they are impartial and give excellent advise.]
Best of luck