I have Dobinson standard length 110 shocks in my County, they have survived for 60,000km so far and are still good. Whilst my County doesn't have quite the weight of the PTO winch, it always runs loaded up with gear including hi-lift, tool box, aux battery, axe, spade, a week's worth of food & water and with bigger tyres. I suspect they'll control your ride quite admirably, however, my County is nowhere near as firm as my FFR, and feels a little more wallowy around corners. I prefer my County's ride to my FFR's ride.
Also, why replace the standard turrets with aftermarket turrets that are exactly the same? The turrets rarely fail with properly matched shocks anyway, and being tubular are more protective of the shock than most aftermarket open sided turrets. Waste of money IMHO.