This isn't how things work - you pay income taxes on RSUs when they vest, not when you sell, and their cost basis is the price at the time of vesting. So it's

This isn't how things work - you pay income taxes on RSUs when they vest, not when you sell, and their cost basis is the price at the time of vesting. So it's entirely irrelevant from a tax perspective whether they come in cash or stock. If you want cash, you can sell the stock and if you want stock, you can buy - the tax consequences are exactly the same.