Seem to feel every bump in the road and it rides very rough on bumpy roads

 

Usually bumpyness on rough roads like city trenches is due to small wheel size. 14-15inch rims yield a small wheel and bumpier ride. However, if you enarge your rim size, youd still want medium profile tires at least. Most people get larger rims and then decide to get smaller tires. You want SOME meat on there for cushen. But at the same time, make sure the combination fits properly on your car.

As for suspension, I'm not very experienced and am interested to see what someone would say.