I'm pretty new to the "real" golf club world. But I have been obsessed with it since fall and from what I have read (and I have read everything) I would say you got yourself a great set of sticks that should last you a lifetime. Congrats!
And although fitting is made out to be the most important thing about buy clubs I personally think it is overrated for high handicappers. I personally just like to use the standard measurements based on height and wrist to floor. If the clubs are designed for those measurements then I am thinking my developing and changing swing should probably learn to use them like that. Therefore I use standard in everything since I am 5'8" and my wrist to floor is 34" and this is standard length and lie for just about every manufacturer. And as far as shaft flex goes it probably won't make much of a difference for a high handicapper. Karsten, the genius of PING, used to think everyone should play stiff. The pro at Golf Galaxy told me that shaft flex has nothing to do with distance and that the stiffer the flex the tighter the dispersion. However he said that if the flex is too stiff it could lead to more balls slicing more. But still have a tighter dispersion. And believe it or not I saw this on the launch monitor when I compared the stiff shaft to the regular on my g20 driver. I went with stiff cause I feel I can learn to square up the face on anything eventually.
When pros talk about what club or shaft fits them best they are looking for small degrees of launch angle distance or small rpm differences in spin. As for my experience as a high handicapper I don't see those things making much of a difference since I will get 8 different results on 8 different swings.
So I think high handicappers should get fairly forgiving clubs in a shaft flex that is somewhere close to their swing speed, but error on the side of slightly too stiff. And unless you swing like a grandpa your stiff flex should work well for you and your club selection is spot on if you ask me.
Sorry I got a little long winded there and I am sure I will be torn apart if other people take the time to read that. And I could be way wrong since my experience is limited, but I have been completely obsessed by golf equipment. And I like to think that I am pretty good critical thinker. So take it for what it's worth to you.
Here is the PING length and lie chart: http://www.ping.com/uploadedfiles/custom_fitting/ping_color_code_chart.pdf
And here is the PING online fitting system: http://ping.com/fitting/nflightweb.aspx
And at the bottom of the page here you will find PING's recommendations for shaft flex based on swing speed: http://ping.com/clubs/driversdetail.aspx?id=15149