i had tokico illumina's (white adjustable shocks) in my mustang and they were friggin awesome. my friend has the blue's in his ser and he has no complaints. couldn't give you any specifics on the blues though
Blues are barely stiffer than the OEM Tokicos. H&R springs are said to be the softest and most comfortable spring available. The pair will work and it will ride nice. Just be aware that the shock will not last as long as OEM or if you bought an adjustable like Illumina.
H&R makes (I believe) three different types of springs:
OE -- just a tad lower than OEM, just a tad stiffer.
Sport -- usually 1-2 inches lower, somewhat stiffer
Race -- 2-3 inches lower, much stiffer
So it depends on how much you can take, which also in part depends on the conditions of the road. Because of the sheer number of cars and people on the highways, California has the worst roads in the country and I wouldn't rock stiff race springs here in pothole-heavy San Francisco.