Ok I have to edit what I said in my post a little... So yeah I'm not sure if it's microATX, but given that it's a SFF case, it would most likely be mATX size.
Here's the case of the GX270. And
here's the case I'm planning to get. So I mean, it's somewhat similar, and if you look down on the GX270 page, it shows the inside of the case. From the looks of things, it doesn't have any weird cooling setup mentioned above.
Now what I'm also wondering about is the power supply... From all that stuff about Dell and proprietary parts, I'm not sure if I can use another power supply with the motherboard. So should I also transfer the PSU along with everything else?
This is also brings me to my worries about the PSU in general... I think it's just under 200W, so what's going to happen as I add the audio/video upgrades? Will it still hold up?