I'd say keep it since original lip is hard to come by and it's freshly painted. Brand new is over $600 a pop!! The cheapest knockoff Mugen lip is only hundred plus so just get it and save the CTR lip as a spare. You might get tired with the Mugen and realize that the CTR is better. It's original lip after all.
I have plans to change to lighter rims as mine are too heavy. I don't know what kind of lousy rims the seller give when I bought this car. I do not have knowledge on wheels yet that time.