Pnzr-Cmdr
Dragon does a HVSS set as well, a lot easier to put together and it is also much cheaper D3814.
The Dragon kit will be the cheapest option.
Otherwise the next cheapest option will be:
Dragon's HVSS kit,
plus the Italeri Marine M4A3 kit's Hull or any Tamiya M4A3 Hull (M4A3E2?),
and Italeri's M4A1 kit's Turret.
You will still need to make / get a muzzle break as well.
Hasegawa make a 1/72 (Almost) kit of the M4A3E8 (quite nice)
Hope this helps!