I have a 04 honda civic lx coup that I want to do an engine swap on for a bit more power any suggestions?

People have told me that the k series is the way to go cause i won't have that much fitting issues, I don't have that much money now but i'm not in any rush to do it i want to make sure its done right and little by little tune it so that it can be the best that it can be with out being to flashy with it any advise?

Sell car, buy car with more power - cheaper, simpler and more practicaL