You're probably a bit underspined, or leaning towards it. Here's a chart to look for yourself: http://www.goldtip.com/downloads/2006sizing-chart.pdf , but I'd be shooting 7595's if it were me.

And is that the new Bighorn, or and older model. I have a 2000 Bighorn Hunter Single Cam, and it shoot as nice as my Highlander actually.