I just quoted almost this same system to someone with the same budget. I just tacked on a monitor. You can really get whatever Mouse/Keyboard you want, since those are things that are more about comfort than performance. This system is pretty top end, so if you feel you want to, you could probably shave off about $150-300 and still have a very nice gaming system.
The 7970 ghz edition is better than the 670 in almost all aspects. Picking out a case is mostly about personal preference, airflow and ease of use. I personally love my Corsair C70 arctic white. Though I almost bought a Antec 902. As for SSD's once you get one you never want to be without one. There's little improvement in gaming from using one other than screens loading faster. But they cut your boot times by at least half.
Just check around that website tbh. I found it pretty helpful
Originally Posted by Melt
Funny thing. In Germany we translate scientist into Wissenschaftler. Translated word for word that would be "knowledge creator" and it shows very well why I stopped accepting science. They get paid for creating all these statistics. They have deadlines, they have people they have to listen to and they have to "strive for the next sensation".