Closed loop liquid coolers aren't worth it. You can get just as good performance from an air cooler. What cpu are you using because something like this http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
will probably do.
Proper water cooling is more of a hobby than anything. With your case you'd either have to take out your 3.5" bays or put a 200mm up top but i don't know if you'd have enough space.