Lowering springs vs coilovers - which is better for daily?

Want to lower my G20 330i by about 25-30mm. Should I go with lowering springs (Eibach, H&R) or coilovers?

Springs are cheaper (300-400 EUR) but coilovers give more adjustability (800+ EUR). For a daily driver that never sees a track, are coilovers overkill?

Also worried about ride quality. My roads are pretty bad (Eastern Europe lol).