Hello,
I had the anti-pitchpole attachments on my H16 and I thought they were worth the expense. There were a few times when I felt they saved me from a tumble. If nothing else, it'll give you a little confidence to push the boat harder.
I know that the SoloRight is a well proven righting device. It has worked for boats up to 21'. Gary's website is at
http://www.geocities.com/hobiegary/soloright.html The righting pole that is sold at catsailor.com is another option, but I'm think it's use solo depends on your weight.
Jack