I bought my micra with chopped springs, the fronts ended up falling out of the correct seating and wearing into the shocks, very dangerous, ride quality was stiff, very stiff, everybody complained about it and i used to bottom out on bumps
As far as looks are concerned, looked tough, I would recomend coilovers as I love the looks of a lowered micra, but I had to go king springs as my car does a lot of rural driving and has to double as a billygoat to get up a really bad long driveway at my sisters/mums farm regulary. Exhausts are expensive to fix or if u do them youself just a pain in the bum
Maybe at least do the fronts first with c/overs and chop rears, but in my experience chopping old springs always ends up with one side sagging more than the other.
Plenty of information on this site, use the search and study about it before chopping maybe your only springs. and read about adjustable panhards and other suspension parts