The fractal case has top buttons and connectors.
Antec 300 is overpriced shit, much like most of antec's cases. That's not to say it's not a good case at $30, but not at whatever price its at right now. You probably won't be disappointed with it if you do get it, but know that I really seen them for $30 in the states, whereas the k-58w, k-57, and CM 692 are all in the $50-$80 range.
These are things I like to look for in a case:
Amount of rice - the most important part when you think about it. Once you get everything assembled you're only going to look at the outside. I am so against rice that I have become a ricer. That fractal case looks awesome to me.
Cable Management - holes in the motherboard tray are a must so you can guide cables through it to keep the case looking clean and having good airflow
Side mount HDD cage - not only does this make it easier to get the HDDs in and out, it also makes connecting them easier, and lets you turn them around to hide the cables even more should you so choose.
Airflow - the most important part when you don't think about it. Also pretty "meh". More fans=better airflow. There's a lot of theories out there, and none of them are probably completely true. I just know that I like having few holes in my case so I can maintain a positive pressure, allowing me to filter all the air coming into it. More fans=more filters.
Number of fans - ties in with airflow, and can save you from buying more fans. Factor in the fans when you compare prices. Often times the $10 more expensive case model comes with 2-3 more fans.
Bottom mount PSU - less efficient, since the PSU doesn't help cool the case, but helps the PSU stay cooler, last longer, and keeps cables naturally out of the way via gravity.
Front panel - 99% of all cases have 2 USB ports, most have audio jacks, a few have firewire, and even less have eSATA. The location varies too. I have mine on the top, which makes it easier for me to get to, but obviously then you can't store anything on it, or put it in a cubby hole.
Removable motherboard tray - just gravy.
Huge hole in motherboard tray - just gravy for quick change of heatsink. You can also install the motherboard, THEN put on heatsink if it's enormous or something.
Price - always the deciding factor for me, along with looks. A low price would be the only reason I buy an antec 300. But if I want a $30 case, I may as well go grab a free one and use that instead, so I still probably wouldn't ever get an antec 300.
This one
looks pretty damn awesome to me, but I'm just guessing here.
http://www3.hardwareversand.de/articledetail.jsp?adp=0&aid=48895&agid=631
"Parliamentary inquiry, Mr. Chairman - do we have to call the Gentleman a gentleman if he's not one?"