I'm around 80kg which is like 175lbs if my converter is correct. I believe the F3.0s will be great for you. They really aren't that stiff. I'm using them for two weeks now and they still feel as good as on the first day. They might even soften up a little when time passes.
PS: I'm the same guy you are asking in this thread: http://www.snowboardingforum.com/boo...tml#post828098