Choosing a case is so much harder these days, before the only decision that had to be made was the choice of a Midi Tower or a Full Tower. Now the decisions are almost endless, midi or full, steel or aluminum, black, silver or colored. Then you can choose if you want to purchase a power supply separately or will you be happy with the one that comes with the case, until recently the quality of the power supplies that came with cases were very low, fortunately cases have come a long way since then and quality companies like Antec are including their power supply with their line of cases. The wattage you need will depend on how many devices you intend to run, while the average will be around 300 watt, some people may choose to go to 400 watt or the insanely high 500+ watt.
Case modding has become such a big thing, so much so that case producers are aiming for the market of people who want a bit more then that ugly beige looking case we had to put up with for years. Antec have been producing a good quality line of cases recently and the latest two additions to their range are the new Antec Sonata and Lanboy provided to us by PC Case Gear. These cases have a lot to compete with considering its predecessors the 1000AMG and 1080AMG did so well, it will be hard to knock them off top spot for value for money.