My biggest paranoia is the motherboard's ports not fitting the back of the case. Call me insane, but that's it. I do suppose I should follow that advice though, because I think I'd like a full server case. And also, a good idea to me would be to shop once I have the money, because that stuff is under limited time rebate and will be more expensive. 
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If you plan to move your computer around at all, you don't want a server case. Just get a full sized desktop case.
The bezel in the back is usually specific to the motherboard, yes, but the dimensions of the bezel are pretty standard. You take the old bezel out, put the one that came with your motherboard (all motherboards you buy new -- ie, in a box -- come with one), put it in your case and then you have nothing to worry about.
