GREAT DISCUSSION!!! (this is what I was hoping for).
Given the ORANGE line, seems like adding a significant amount of complexity to raise it some 18" (over 60" base). Which only comes to about a 5-degree slope.
To get a PURPLE 10-degree slope, you need to add nearly 3 FEET of height? Wouldnt all that frontal area, negate any effect of a more streamline flow?
What about option #4, "diamond" shaped front and roofline (pseudo-round) ?
Still with only a 5 degree slope. Yeah - that is significantly more complexity and welding time...
Is it even worth trying to get that 5-degree slope...?