Conventional wisdom says that a high handicap player needs more forgiveness so a larger clubface, making the JPX range, and particularly the Hot Metals, the best choice. But a lot depends on what you feel confident with, and on what causes your handicap to be high; if you have a dealer nearby who offers swing analysis, try out a range of different heads, and don't feel limited to the initial "ah, you must need a game improvement club" suggestions.