i’d be curious to know how they held up. I guess that would prevent the corrosion.
if he is dead set on adjusting height up and down summer to winter then deffinetly go with coilovers. but if he’s not perpared to install them himself then maybe he shouldn’t bother. To adjust the height on mine you had to disconect the coil over from the knuckle, which was arguably the hardest part of the install.
if i were u and i installed the springs i’d just deal with the ride height difference… probably wont make as much difference driving in the snow as you’d think.