The Rapier is imho the best sports cruiser around with plenty of performance. The H3 goes up a rung, feels tauter, turns that much tighter, is generally that much more responsive and because of it's width is more forgiving than other hp boards might be. I'm with Dinkum on the single fin - just personal pref. I find the steering very accurate which is great on smaller days when navigating through Sponge City!
Sounds like you have found a great deal there - go for it! :)