i've lower my old 3000pound eclipse 4in with ebay coil-over with 2 blown shocks, it was riding smooth even over bumps.
if you get stiff springs, it shouldnt matter too much even on blown shocks
lowering 2inch on stock should not be a problem. though it will shorten your shock's life

shocks control your bouncing problem, but if your springs are stiff it wont be too big of a problem.
the springs on the eclipse were 25-30% stiffer than factory

im putting some ebay spring on my 2000ex at the moment, i'll give you feedback once done