I use both. One feels more singular while the other feels more plural though I can't tell you which when you ask me. We have to sneak up on it together.
I have the same issue with "Thuh" and "Thee" for "The."
"The" does have two pronunciations depending on if the word after it starts with a vovel sound or not. It's "Thuh" for consonants and "Thee" for vowels.
To complicate it further some varieties merge /ʌ/ and /ə/, or /ɪ/ and /ə/. And I'm not even taking into account varieties using a different consonant, /t θ d f v/.