New To Mitsu''s

So I have wanted a Lancer for about 5 years now and am finally going to be taking the dive in about 3 months or so (starting new job) I looked at an 07 ES today and drove it for a bit. I enjoyed the drive my biggest problem was the gauges. If it happens that I do end up getting an ES (really want on OZ or Ralliart) I just want to know how easy it is to replace the gauges with OZ style gauges.

Thanks for any feedback on my first post!