Zak,
Your setup looks like it will be pretty close to ideal, and even if you can't squeeze the front left speaker into the narrow zone, you'll be off only by inches. Keep in mind that the placement angles are ideal recommendations for a perfect world -- one without pesky furniture or the opinions of spouses.
Don't sweat it. I can pretty much guarantee that the majority of forum members here are further from this recommended placement than you're going to be, yet we still enjoy our systems thoroughly.
