Cortez
Tough but Fair
I'm the older end of the market, but at 5ft 9in, sizing down to a little un isn't really an option, unless I employ roller skates. But I reckon a nice 15.2 will do me fine when I need to find another horse.
Do remember someone saying long time ago in a horse article that she bought her mother an Arab as they are more sensitive off the leg so less slog to get them going (as long as she could stop her,too!)
I'm 5'9" too, and currently have a 14.2 Friesian cross and two PRE's which are 15 & 15.1 repectively - all built like rather elegant tanks, 'tho........