you can always go with the Antec Skeleton
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129056&nm_mc=OTC-Froogle&cm_mmc=OTC-Froogle-_-Cases+%28Computer+Cases+-+ATX+Form%29-_-Antec-_-11129056
there is though the benchmark/workstation style if you prefer that too...
I understand where you are coming from and it seems like a good idea, but in reality it just not going to work as efficiently as you want it to. When air gets warmed up its flow tends to go to the top. This is why most exhaust fans are at the top of cases today. They are placed there because...
Sweet setup man. That desk is killer did you build that or buy it whats the story behind? I am building a new desk and that top is what I am looking for.