Last question , I can answer. I have a 300. There is a full mesh filter, removable,cleanable, in front bezel. Without cutting ? You could fit a 120 rad in there, much like what people do with the corsair h50 self contained. Of course it won't be as efficient in there, your heat exchange VS outside the case. I'm not recomending this kit, but something like this, you could fit in there I suppose. http://www.newegg.com/Product/Product.aspx?Item=N82E16835128015&Tpk=gigabyte%20water%20cooling
Its a level up from the simple self contained systems.
Another solution for having no tube holes, this passes them out a expansion slot.http://www.youtube.com/watch?v=dmcZ3KyfiPA&feature=fvw