it's all to do with the quality of the shocks
most shocks have the oil & gas together, that get's hot and aerates and goes off, they do come back after they cool down but loose a bit
then there are the shocks that have the canisters, that separate the oil & gas
problem is the cheap ones are copies of the good ones, but charge too much
the good ones are very pricey because the poor $ and the freight involved
i have raced on King Shocks for 10yrs ( have been a King Shock dealer for 15yrs)
I've put them on 200 series and those owners have fitted them on their 2nd 200 series
at just over $5k they are an investment but a once only , they are rebuild-able and every part is available
i have done 140k on mine, yes the shafts have been knocked around , but they still dont leak (and they are adjustable)
after seeing inside the Dobinson MR shocks , i will never sell anther set after both sets failed
the hardest part is working out what your doing with the car
if you set it up to be packed and go remote touring, when you remove all the gear the car is hard as a rock
if you set it up for driving around when you pack it it's too soft and bottoms out and is low
i went with a raised spring and fitted airbags and then good shocks so i can add air when i need and can let it out when i dont
lots of home work is the key
buying expensive is hard on the pocket ( but you only do it once)
buying cheap is half as hard on the pocket , but you will have to change them as they still have a life of around 60 to 80k anyway
but at least you can change to something else that might feel better for the first bit
i you need help with the King shock give me a yell