All depends on how hardcore you want to be on the track / what you can cope with on the road. You probably don't want a full time, fully stripped road car neither do you want a full time, full lard race car.
Mixed road/track cars usually end up being a compromise - up to you where you draw the line. So start with the obvious stuff and go from there, using the above thread as a guide.
Don't remove the ABS on a road car, more advantages than disadvantages to keeping it.