Stick with Denso plugs ( OEM )
Get everything at your local auto parts house and install yourself. Pick up a Haynes manual while you are there. It will spell out in detail how to do this job, and others.
You will save LOTS of $$$$$$$$$ and have the pride of doing it yourself. This is a one bananna job, meaning very easy.
Even if you have to buy some basic hand tools, you will still come out way ahead $$$ wise today and in the future.