I think cursive-ish/Italicized is definitely the way to go to convey higher-end.
I love some of the ornate characteristics in some logos I found on google images below. Some combonation of ornate-ness and/or curisive-ish typography I feel is the way to go. The links below show a some different variations of that.
https://cdn.spellbrand.com/wp-content/uploads/2013/10/day-spa-logo-design1.jpghttp://graphicdesignjunction.com/wp-content/uploads/2010/08/logo-design-inspiration-15.jpghttp://blueblots.com/wp-content/uploads/2011/11/18-BaliSpa.jpghttps://i.ytimg.com/vi/WxzPAbpRD-w/maxresdefault.jpg