As with all things Sheman, it depends...

Do you want to use metal tracks? = Tamiya hull and gearboxes
Do you want a superior model? = Tamiya hull and Nick Agular upper with a Tam turret
Do you want a cheap model? = Stock Mato with a Tam turret grafted on to the Mato base.
Do you want a more common small hatch / Dry Stowage M4A1 75mm (big hatch / wet stowage M4A1's like the Mato hull were rarely used for 75mm gun tanks) = Stock Mato + Profiline kit.

If you want to use Tamiya electronics, look out for the "Super Sherman" MFU rather than the Pershing - this has the correct radial engine sounds (and a recoil output that the original 105mm version lacks)

The metal Mato bogies are nice, but need a little work to the springs to make them sit right. I'm not yet convinced that they are a "must have" item, as I've been running stock chassis for a while now without issues (but with the plastic tracks). Same goes for gearboxes (with the same caveat).

Hope this helps point you in the right direction?
Mart