I'm not a professional fitter, but I'll add my 2 cents. I would seriously consider trying those clubs with an R flex shaft. I'm a few years older than you, in the same boat for SS not getting any faster, and plated S flex until 3 weeks...
If your drives never get more than 7 feet off the ground, you likely need some adjustments made to your swing. Get that in order, then you can be properly fit to a driver.