You will also need to realize that there are a number of different approaches to building a system. In general (and while some low priced speakers like Tekton have their followers), I would recommend spending big on your speakers. They will make the biggest difference. To be satisfied with what you are getting, try to audition as many speakers as possible and to think about what aspects of music are most important to you. Some people like very forward speakers (Zu and Tektons would be examples) others find forward speakers fatiguing to listen to and prefer more laid back speakers (think how in your face the sound is). This will be both personal preference and related to music genre preferences.
At $5k I might spend as much as $3500 on speakers.
At $5k I might spend as much as $3500 on speakers.