Is there a difference between fresh and frozen turkey?
I don't have a definitive answer on this one, but our house made fresh and frozen turkeys in the past and we think the fresh turkey is juicier and more tender. However, when done right, it's hard to tell the difference between the two. It's more important to not mess up the turkey rather than the type you get. Since frozen tends to be much cheaper, I get frozen.
Tip: Make sure you give enough time to fully defrost or you might have to resort to this: http://www.disgracepointonline.org/2008/11/dishgracepoint-recipe.html
5 hrs/lb is a minimum for thawing a turkey in the fridge. If you are cooking for this Sunday, Thursday would probably be the absolute latest for thawing.
30mins / lb is a minimum for thawing by submerging in cold water. Replace the water every 30 mins. It'll take about 8hours on average with this method.