I'm in the midst of building my new computer and I'm currently looking at cases.
The parts I'm buying are an i7-860, ASUS P7P55D-E Pro motherboard, most likely an 5770 or similar graphics cards, a 650W PSU and a few other items. I need something large enough where there won't be any sizing issues with larger graphics cards (I also might go SLI or CrossFireX) and I want there to have good airflow as well.
If you're going to have an i7 and a decent video card I wouldnt go with the centurion unless you don't mind modding the case to work. one 80mm and one 120mm are most likely not enough. Consider that my old pc is still running a single core athlon64 chip and 3 weaker 120mm's arent enough for that outdated tech.
If you are going to stick with air cooling then the antec 900&902 or 1200 are a great deal. They offer multiple 120mm mounting locations which makes the case a literal windtunnel. The 200mm top fan also seems to do a nice job of venting heat up and out.
I will admit that the HAF cases do seem like they would provide some pretty nice airflow options as well, however, if you want to upgrade these fans for any reason finding a good replacement might be hard. 180,200,230mm sizes are still in their infancy it would seem. If you are going to keep the stock fans then this doesnt concern you.
I was looking into the Raven RV02 case myself. If you have the pc sitting on the desk or hard surface the airflow in this case is ideal. Keep in mind that some of the longest video cards may just barely fit and that you might need cable extensions depending on your setup. Overall I would say this is a nice case for the money if you do not mind a little more setup time. If this is a con then go with the antecs instead.
Ultimately just look for a case that provides some decent fan mounting locations, fits your budget, fits your appearance standards and has enough room for your graphics card. Usually they state the max length card they will support. If you would rather leave that out of the equation then go with a full tower for sure.