Proposed Backpack Case

I know people have suggested these before but I have never really seen anything done with the idea as far as the major case mod forums go. Rather than post in the general case mods section I'm turning to you guys first since this will be, after all, a micro-ATX build and you are the subject matter experts.

This would be my first micro-ATX build and I have only done minor case modding until now. I would like my first real project to be an ambitious one and, whether I fail or succeed, I plan to learn a lot about case modding and miniature builds in the process. Any input you have is greatly appreciated.

I am still trying to work out just what power supply I want to use and how barebones I want to keep this project. I would also like to keep it fairly conservative which is why I am not opting for anything like an i7 or a GTX 680.

Parts list so far:
Motherboard: ASUS Maximus V Gene
Processor: i5-2500K
Video Card: EVGA GTX 670 FTW
RAM: G.SKILL Ripjaw 2x4GB DDR3 1600
SSD: Two OCZ Vertex 4 128GB in Raid 0

The backpack:
My tentative plan is to house it all in this backpack. I already own one and it's a fantastic pack with plenty of space. I chose not to go with a hard-shell backpack simply because I do not like how they look. I realize this creates a problem with rigidity of the whole project, but I plan on welding together a frame for the inside of the pack to help keep its shape and to give it some structural integrity. The base of the frame will be a Lian Li PC-Q06 motherboard tray attached to the laptop pouch which will, in turn, be secured to the back of the backpack.

I also chose this over a hard shell because it has a ton of storage options outside of the main pocket. My only qualm is that I have one chance to get the cutting of ventilation holes right. It's more expensive than many cases even going through a supplier which strictly does discounted business with military members, so I have to get it right the first time.

The cooling:
I would very much like to use closed-loop liquid cooling in this build like the Corsair H80 or the Thermaltake WATER2.0, but I am having trouble believing they will hold up well against the constant movement during travel. Their access to the outside of the case would be at plated welded to the internal frame with external grates/filters, but I don't know how I would feel having those tubes full of liquid floating in the middle of everything. Inversely, I don't like the idea of using a fan inside the bag because I would like as few moving parts as possible.

The monitor:
The bag has a padded pocket capable of holding a 17" laptop, which is where I hope to hold a similarly sized display. The problem I am running across is that people do not sell new 17" widescreen displays any more. Because of this I will either have to scrounge around the internet for a well-kept 17" widescreen or attempt to go with something a bit larger. This, of course, creates the problem of storage within the backpack.

The power supply:
Unlike the other few backpack case mod ideas have seen floating around I plan to run this only from outlets; otherwise why not just buy a laptop. Simply put I have not yet put in the time I would like to in finding the coolest-running PSU possible. I will probably end up needing at least a 550-600W modular power block. Ideally I would like to go with a fully modular supply like this one in order to cut down on the clutter inside.

So there it is. I'll draw up some ideas for air flow and an internal frame when I get home from work but I would appreciate your initial thoughts on the matter, being the masters of miniature cases and air flow.
Edited by Caples - 9/8/12 at 12:27pm

Ah. I meant to put micro-ATX.

I do see your point about the riser. I didn't think of that.

The tray I was planning on using as a base for the whole frame, but I suppose it would make for a better fit to custom weld the whole thing.