BUILD! I don't have a lot of experience building PC's (I've only really built one, although I've helped others), but I've found that the 'hassle' and 'troubleshooting' encompassed with building PC's actually really fun

By the end you really feel like the PC is
your machine.
Not to mention it also saves you a butt-ton of cash. The PC I built cost 1,650$ to build, and would have cost 3,600$ if I had bought the same thing fully assembled.