Thermaltake ArmorPlus(Armor+) VH6000BWS Black Aluminum / Steel ATX Full Tower Computer Case $184.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16811133056
If you want a nice big window this would do. However;
COOLER MASTER HAF X RC-942-KKN1 Black Steel/ Plastic ATX Full Tower Computer Case $179.99 and free shipping!!!
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119225
I have this case and it has a lot of roon inside for mounting radiators and resivoirs and a pump. The side window has a 200mm fan in it and I felt that since I was doing water cooling I didn't really need it there so I cut it out and replaced the L shaped window with almost a full 480mmx480mm sheet of plexi , now the side pannel is almost all window. Since the case comes with one top fan and there are places for two that is where I put the fan from the side. You can see from the picture on the side of thei post what it looks like.