(a) There is nothing inherently wrong with goat skin. However, there is quality goat skin and poor goat skin. On leathers:
Lambskin: Mainly used in "high-end" jackets. Extremely soft and excellent to the touch, but not as tough as goat or calfskin
Goatskin: Many times it is textured or grainy in appearance. It falls between lambskin and calfskin in terms of durability and is soft to the touch, but not as "buttery" as lamb
Calfskin: Tough, like armor.
(b) I am sorry to inform you of this, but more often than not, Hugo Boss falls into the poor quality category. It sits relatively low on the totem pole of quality brands. You pay a fair amount for the name. I wouldn't pay $600 for it, but it may serve your purposes.
(c) If I were you, I would look at TOJ (or it's new name John Coppidge). They make an excellent jacket and it is MTM (made to measure) so it will fit exactly how you want it to. I am extremely similar to you in measurements (6' 4", 200 lbs, 42.5" chest, and ironically also 27). I have one jacket from them and another on the way. The first one fits me excellently (in my opinion).
Their website is: http://johncoppidge.tumblr.com/
You could get a Collared Moto or regular Moto in black that would look very similar to the jacket you posted/cafe racers. They also have other styles you can look through. If you want something your wife will like to touch, I would highly recommend either of those two styles in black lambskin. TOJ uses a thicker lambskin than is pretty darn durable. It holds up to against my 95 lb Labrador anyhow. That said, you could get the jacket in black goatskin or black calfskin should you wish to do so.
The only down side is they are somewhat more expensive (~$740), but the difference in quality is enormous. They will be discontinuing their MTM service soon and likely upping their prices, so I would act soon if you are serious about it.
Their sizing guru Charly is excellent with getting you a good fit and suggesting jacket measurements. If you have any more questions feel free to ask.