Don't get kyb agx, complete garbage. I went through few sets with my 91 eclipse gsx and with the galant.
I can't comment on the BG coilovers but I did have a set of B&G lowering springs on my 91 eclipse gsx and I wasn't too happy with them. I don't know if BG and B&G is the same company however. But the B&G's I hasd were advertised as a 1.6" drop but they were more like a 1.8" drop and shorty after thet sagged to about 2.0" drop. And as far as spring rates go they felt very soft.