From a bloke's point of view (no, don't laugh - we men are aware of what women wear under their tops), is unless your are into risque fashions, go for comfort.  A mature lady should go for a good, all round, full covering  bra with a wide strap (three clips) at the rear, perfectly suited for a high fitting top.  You cannot help but notice the youngsters of today go for a bra with a single clip less than3/4" wide which tends to cut into the wearer's back, and they have the setting too tight - far too flimsy.  It doesn't matter what it looks kike - at the end of the day, the only person who's ever likely to see it, last thing at night,  is your husband.  

There, that's from an old man's point of view!