Lift controller just came out for the XRS (Hydra EMS) and Apexi PFC will have a harness available for XRS as well. It lowers lift to 5700 rpm and raises the rev limiter to 8700 rpm. It is still a bit new so you might want to wait for a while. Or you can buy Hydra EMS and get it tuned by Monkey Wrench Tuning. They specialize in 2ZZ. You can email them and find out.
www.monkeywrench.com.
If you are curious, you can see hydra tuned XRS with bolt ons:
http://videos.streetfire.net/search/corolla%20xrs/0.htm
Before you think of tuning, I would recommend starting with basic bolt ons since 2ZZ responds extremely well to them i.e. Cold Air Intake, Exhaust, Fidanza flywheel, Clutch etc. These are best bang for the buck since combined they make the XRS dyno around 175 whp whp (up from 150 whp stock).