what is the best way to handle a new company with 10k SKUs that is moving into NetSuite to get the cost/value for each item so that smart count wont recvie the invotry at zero

Isn't the cost listed on the PO / receipt you are posting? Or if loading initial balances wouldn't you just add the cost on the inventory adjustment?

Inventory adjustments, against asset account (not an option to do otherwise) and a temporary account that you later close. The temporary account will get credited and will represent your stock value from your old system. Then you debit that temporary account with the total inventory amount when you do your complete migration of balances.