Hi Wade!
Being that you get quite a few custom parts in the standard version, and sand shields were not a big item on US tanks, I would suggest the standard version. I don’t think 2 jerry cans are worth $23.
Having built the RFM M4A3 HVSS, I can tell you that this model is going to be a dream build. Mine required no putty at all, anywhere. The fit is that good.
Have fun with the suspension units, they are each a kit unto themselves.
Matt, thank you for the intel on the new Sherman kits and options. I’ll be passing on the upgraded version. That’s a big price gap for what’s provided in Wade’s World. Standard is looking good