I have a few bits to do on my car and therefore have the cash for a anti lift kit or a rear anti roll bar at this stage so question is where is the sensible money spent initially to get best handling? (I may get both in future)

I'd have thought a rar bar a good place to start and easy to fit      factory ones come in approx 4 sizes so it's potentially a value upgrade without any obvious mods'    or expense of aftermarket  uless you're getting very serious