@dondan I have been following this thread since the start, happily just lurking and watching the progress... and I just finally made an account to beg you to please continue with your original vision for the C4. I think all of the work you have put in is top notch, and you are so close to having another fantastic case entering into your lineup that MANY people are excited for... myself included!
Don't let the haters get you down about the liters nonsense. You gave a perfect example about seeing a side by side comparison of the A4 and the S4 Mini... the S4 Mini looks huge in comparison, and we all know it's a feat of engineering with how everything fits inside it. The liters don't really matter in the long run.
Also, if YOU like the uni-body design for the C4, and that will make you happy to make that switch, then go for it! This is YOUR project, and I can tell you that as sexy as I think the current rendering is, and how badly I want that sitting on my desk... I can also say that I thought your rendering several pages back with the A4 look was fantastic, and true to YOUR brand. For the record, if I would've had an account to vote, I would've put my vote toward it! You also say that it's cheaper to manufacture, and has less chances of defects in the process? That's great! I'm ready to shell out some serious dough for this case, but if the price goes down, I can't imagine too many people griping about that.
Before this becomes a novel, please note that this whole forum is behind you and your choices... even the haters I mentioned earlier. Whether or not people agree or disagree with your choices doesn't change that we support what you are doing, and appreciate all of your efforts. Save the MATX for the next project we all will get behind you on, but please don't drop the original concept.
Thanks again for everything you do, dude. I wish you luck in the upcoming decision making.