RE: HL tracks...
I do have two Tamiyas, the M4 (on it's way to becoming an unissued HVSS Firefly) and the Tiger I, both about 6-7 years old at this point. I recently bought TBUs for my sons and I, but that left one person out and I couldn't see springing the scratch for the Tamiya Panther G right now, so I tested the HL waters.
I fully agree that Tamiya tracks don't need replacing, but I couldn't see the plastic HL Pz III/IV tracks holding up under strain, but then again, I'm a novice to battling. I'm looking forward to getting my hands in a battle soon. To me, tossing a track might be part of the fun, but like I said, I've never been in one bigger than two in my backyard.
I love the mods and tinkering, I would have built a Pz I years ago if it wasn't for the difficulty of make the tracks and wheels. Not that difficult, I have all the equipment for vacuum and pressure resin casting, but too time-consuming for me right now.
HLs are the perfect blank canvas.
In terms of a Pershing, I have a small library of German armor references, so I tend to move in that direction.