I have regular medicare and a supplement (Blue Cross). Regular medicare price is the same nationwide, but supplemental plans differ in price and coverage in every location. I also have Wellcare for part D., but part D plans also differ in premiums depending on the meds you take and the company.
Advantage plans are great, but you CAN'T have a supplement with any advantage plan. If you are real healthy and don't forsee any large medical bills, Advantage plan is probably best. However, if you see doctors a lot, a supplement is best. Supplements are not cheap, but doctor bills, hospital bills, and procedures are even much much higher.
I have an independent man who reps different ins. companies and determines what is best for each of his clients.
He gets paid by the companies, not by me.
It takes time and research to find what's best for you.
Good luck.