Had to follw this thread all the way through - lol!
I too am well-endowed. I actually fly out to Edmonton to visit my daughter and while there invest in one or two bras at Dawn's Bratique. (I have them note which bras fit me best so I can phone and order another when my daughter & SIL come at Christmas!) These bras range from $89 to almost $240 - BUT I can wear them for years! Just retired the first bras I bought there 5 years ago.
My favourite brand: PrimaDonna and I used to love Olga but my favourite style was discontinued.
Go get properly fitted - and don't leave till you LOVE the fit. Then buy/order 2 or 3 and rotate wearing and washing.