You spent the money, so pronounce it anyway you see fit.

I was at a jewelor once and I asked the snot behind the counter if I could see a particular Tag Heuer, and I pronounced it "Tab Hewer." She corrected me and said, "It's pronounced hoya." I said, "Well if I buy it, I'll call it hewer." She just smiled and probably thought I was an arse-hole.... I am though