It's obvious that I have opened up something undesireable here by mentioning a 360 radiator. Please understand that I am not trying to twist everyone's arms to accept a huge 360 system. I do not wish for this discussion to escallate into an argument as I have come here to look for comments and different views. However, a lot of the comments are again based on misconceptions and misunderstandings so I will make one last writing on the subject just so that facts are put straight.
Regarding Metroversal's comments: I have to disagree to the height calculation of 370mm + 120mm = 490mm because the original 370mm height is dictated by GPU height rather than radiator height. Also, I explained that the 360 can be placed from the bottom of the base and not elevated with the motherboard because the radiator is in front and cable entrance is from the back. Therefore, the total height of the case can be limited to whatever is necessary to enclose the radiator - be it 410mm, or 420mm or 430mm. In essence the layout I proposed is the same as the current layout except that the front radiator is changed to a 360mm and placed from the bottom of the case instead of being elevated. Therefore, only the height of the case needs to be changed from the original dimensions. Using the original dimensions given (since I am aware of them now) and a height of 430mm which give about 30mm of clearance, we get a case that is 13.6 litres. The rest of the layout is the same except now there is more vertical space (perhaps enough for a discrete pump/reservoir) in the motherboard/gpu section. So, in my mind this is doable. Cable entrance design can also be the same - therefore this system can be flipped too.
Metroversal's comment concerning folding the riser cable is greatly appreciated. As a systems engineer, your concern was also my concern from the beginning and that is why I was searching for comments. Thank you.
Answering schn1tt3r's and others' similar comments, I think you will agree now that the system I proposed can safely be catagorized as an SFF system, unless I missed something critical and have proposed an impossible system. After building my first tiny SFF workstation, I don't think I will ever go back to the ATX format, so I am in the right forum - please don't dismiss me as an ATX'er.
The reason I even brought up the subject of the 360 system was because it was on my mind for a long time AND because of wahaha360's previous comments that he was modifying to a larger radiator. I thought that instead of making the tower configuration wider and more boxy, a slightly taller and towery looking system using the proposed layout could be more asthetically pleasing.
Again, this is my last comment on the 360 radiator subject which I am writing just to put the facts straight and clear any misunderstandings. Please understand that I am not trying to push and convince in the 360 direction, I was only trying to propose another option to consider. I'm sorry if my previous explanations were lacking and caused the misunderstandings. I very much look forward to the P1 system coming to market ASAP!