Ok going by that picture you showed, I honestly don't see how a "peninsula" style tank would be useful, it looks like you're blocking half of it, in which case go with option 1 without a doubt. If you want to paint the "back" black I would freak out that you honestly are considering painting a 6 foot long pane of starphire, you're wasting money.
Going by the two tanks you showed. I honestly would worry about the effectiveness of that overflow over an 8 foot length, you'll need some serious back current along the surface to get gunk from one end to the overflow. While you could also do that with a closed loop manifold or something, the fact you said you liked the look of the eurobracing tells me you don't want to ugly it up with PVC piping.
Also you mentioned Vortechs, realistically you have one wall to put them along the back, and limited space at that. Having had Vortechs on a 6 foot long tank I can tell you they don't really have the "oomph" to push 8 feet with much strength. Yes you an place them at both ends, but again you kind of negate the whole point of doing a peninsula tank. With the first option, 4 vortechs on the backwall would work wonders 2 in the center part, 1 on either side of the overflows.
So yeah Option 1 is my choice, also how thick is the glass, I know starphire is "clearer" but take a look at the glass, clarity might not even be an issue on the non-starphire version.
talk to your LFS to see about getting one of the marineland "deep dimension" series, they have 36" width, however only 6 foot length, but starphire is an option on the front pane.