I have the three hundred. Great case. I taped over the spot for the side fan so that all the air goes through the front air filter though. Thumbscrews are a nice touch and the hard drives load from the front. There's enough room for a 10.5" video card. Bottom mounted PSU, make sure the cables for the motherboard are long enough.
I have this one though:http://www.newegg.com/Product/Product.aspx?Item=N82E16811129042
And haven't added any additional fans. If the LED lights in the three hundred illusion don't bug you, then great, worth the extra $5. But I have found the cooling provided by my 300 to be more than sufficient for my system.
From the sounds of it though, this is not a gaming system, you will not be overclocking and do not have a dedicated video card? You could always go for a cheaper case with less cooling if you wanted then. The 200 is very similar to the 300 and has enough cooling for you at a lesser cost.