It's probably good to get an alignment after *any* change in ride height.
Coilovers, like DF said, have matched spring rates to the valving of the strut. That alone means better ride quality than a spring/shock. Any of the ones he mentioned, JIC, Tein, Tanabe, would not be rough on the street (as a side note, if any of those are too rough for you, it's time for a different car...)
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