Update - Didn't have to redo the sleep study. The doctor looked over my results, said I was making the right decision, and wrote the prescription and sent it to NAPS.
Long story short, Central Sleep Apnea is my biggest issue, i.e., my brain isn't telling me to start breathing again when I stop. OSA was secondary on the list. Due to the severity, I was prescribed what was explained to me to be the "Cadillac" of Cpap machines. It's a Phillips Respironics Bipap SV something or another. Just shy of $3,000 today to get rolling with another $2,500 still to pay. Seems to be a pretty impressive machine...humidifier, modem, bluetooth, etc. Hope I can get used to it, and hope it helps.
Regardless, the folks at NAPS were incredible to deal with.