I don't know one Tiger from another, but I have seen and used both Aber and Eduard PE. Aber PE is thinner and they give some very comprehenisve PE sets. I could not imagine trying to use everything they give you. Eduard's PE is stiffer, maybe because it is thicker, and they don't get quite as miniscule in the PE parts. They do tend to be cheaper and more readily available in local shops & online.

One other word of advice, don't buy PE or aftermarket for this kit just to buy it. Sometimes the kit parts are just fine and more accurate than flat PE. I know Tamiya sells PE sets for their various tanks that just include the grill covers and they charge about half as much as Eduard or Aber, but that's all you get is like two or four PE grills, whereas with the full PE sets, you get dozens of pieces. Academy also does a set of sinlge link tracks that are cheaper. Again, I don't know if they make a set specifically for this Tiger variant.

I have been hooked on aluminum barrels though. I find that Model Point barrels are superbly machined and look like miniature precision instruments. On the down side, they are 2-3 times as expensive as Barrel Depot or Jordi Rubio barrels.