Jackman, it does sound like you may have some extra weight there, but add T-Top, anchors, batteries and other rmisc. items can add up...
as for as your top-end, I'm conviced repropping will get more speed and allow your Honda to spin up to it's max RPM...did you ever get in touch w/ these guys??...they make props FOR honda and are very knowledgable about matchin' props to various rigs...they made mine and it's gettin' all there is from my motor...very happy w/ it ;) ;D
http://www.ptprop.com/
click on ''need help?"...