I wear a pair of JT goggles (no face mask) and have no problem using the iron sights. But maybe that's just me. It also depends on you. I've seen people get shot all over their face. Myself, every "head" shot i've gotten has been in the goggles or in my forehead. It all depends on you, are you willing to take the risk of just goggles only or are you more comfortable in a full face mask. Just remember, chicks dig scars.
"Your vodka + cranberry is worth 40% of the price in tip."
If you are dealing with a bar or restaurant, cranberry juice or any type of juice has no affect on the price of the vodka or whatever booze. Which then has no affect on your tip. Also remember, bartenders live off of tips, so tip well and tip often.