Hi,
Some thoughts.
Myself, I would look at Dragons offerings...the fit is good, reasonably accurate for most of us, although I'm not sure about separate track links, I think (although not 100 perfectly sure) they come with Dragons DS track which isn't half bad and looks pretty good when done. Dragon stuff usually comes with loads of extras. However the instructions as per Dragons typical style can be confusing...dry fit, dry fit, dry fit...look at some online builds..you'll get the idea.
However, they have to be one of the most enjoyable builds in my experience. I've been building armour for at least 20 years and it is without a doubt one of my favorite kits to build..and I'm not even all that interested in building tigers..but I have 3 in my stash...I know right?..really good value for money.
Engineering wise, it's a brilliant kit, I just felt that it more or less fell together..I've built 3 for clients over the years.
Tamiya is always wonderful, you can't go wrong, instructions are always well thought out, engineering is fantastic...although I do think that Tamiya takes some shortcuts and simplifies shapes..though in the end it looks like a Tiger.
AFV Club, I haven't built the Tiger but I did build the Sturmtiger for a client, nice, but overly complicated...some nice builds out there though.
Italeri - Not knowing...
These are just my thoughts, not perfect by any stretch, other may know way more than myself.
Have fun,
Pete