nah, you bought the best one
Beyond cleaning up/painting/clearcoating the valve cover, there's not much you can put on an M30. I personally don't like the plastic look, but to each his own. There are a couple'a writeups floating around on cleaning up the valve cover. I started mine a few weeks ago with some serious degreaser to get rid of (some) of the cosmolene residue. I might pull and paint it eventually, but I can't afford to be without the car for more than a few days, which is what it takes, IIRC.
Are RD chips any good? Why not just get an EAT
best, whit