The honey to mead ratio does depend on the honey, but you usually use 3-4# per gallon of must to get the high ABV batches. I would suggest going a little under your goal, keeping honey on hand for use towards/at the end. It's far easier to add more honey at the end to get your goal than try to plan for the batch to finish at a specific FG (such as to go to medium dryness).
Personally, I like wildflower honey the most, and have used it for the honey in all my mead so far. A lot of people use clover, or orange blossom honey too, with solid results. It really depends on what you like in the honey.
I would suggest using the mead calculator from the menu bar to the left to figure out how much honey to use for your target volume. Add the honey to the container, then top off with water. Get it to mix fully before going on to adding nutrients and the yeast. Then just follow normal practices to get it to ferment fully.