you don't need new bumpstop's as I have shortened the original's and they work fine, also defo front top mount's as these are crap on mk3's and have a bearing in them which fail (but go for top quality one's by v.w or febi bilstein) and you can reuse your dustboot's (again I have) as long as they are still intact and not split. rear mount's are just a rubber bush and rarely need changing but check the condition and replace if needed.
Also if your shocker's have done 70'000 miles I would change them as they do get saggy and robster23 you said eibach was your choice, just remember they do 2 different set's 1 is -20mm (streetline)and the other -40mm(sportline)
and now she sit's 40mm lower...on sportline's
