Tennis Anyone? (Part XCMXXIVLIII) Mystery Cache

Quite recently, I was disappointed to see a puzzle cache that I had attempted multiple times archived due to a destroyed GZ. With the archival of that cache, I was quite expecting one of the usual suspects to jump in and place a cache within a day or two.

Well, that didn't happen. So, I decided to do what I do best and place another puzzle cache! Of course, that means I had to come up with another puzzle. I ended up creating the nifty little puzzle below. Enjoy!

First off, solve the sudoku below to get your alphanumeric key.

Now, you're probably expecting me to tell you that the cache is located at N40 AB.CDE, W075 VW.XYZ. Well, guess what? It's not. In fact, only one of those letters is in its correct place. Instead, I'll tell you the cache is located at N40 _ _._ _ _, W075 _ _._ _ _ and leave it up to you to figure out which letters to fill the blanks in with. Here are a few clues to get you started.

-The letters that you should fill the blanks in with spell out two five-letter words.
-10 different letters are used to fill in the blanks.
-All five vowels are used, however Y is not used.
-The word that fills in the North coords starts with an H, and the word that fills in the West coords starts with a B.
-The Roman numeral for 275 contains no letters that you will use, however the Roman numeral for 1501 contains two letters which you will use.
-No letter worth 5 points or more in Scrabble is used. However, both words contain exactly 1 consonant worth 1 point.
-Neither of the letters that indicate which hemispheres this cache is located in are used to fill in the blanks. However, if this cache were located in Sydney, both of those letters would be used.
-Neither the GC code for this cache nor the GC code for Rich Smooth Aroma contain any letters used to fill in the blanks.

That's all! Good luck with the puzzle, and happy caching!