S&P500 ETF with SRS - best case scenario

What are the options? - in terms of platform and funds - is it only EndowUS and POEMS?

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(The S27 on SGX has low liquidity, so I'm ruling that out. )

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That means DollarDex is similar to these right. If there are similar funds with low fees on DollarDex. So with SRS - what's the best option considering platform fees, withdrawal during retirement and LumpSum each year in contribution instead of DCA

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I did some analysis on the funds available through EndowUs - these seem like they are SICAV or unit trusts?

• Amundi Prime USA (Physical replication):

Expense ratio: 0.05%
Total cost including dividend withholding tax: 0.45% per year
Pros: Lowest base expense ratio, direct ownership of underlying assets
Cons: Withholding tax on dividends increases total cost

• iShares US Index Fund (IE) S&P 500 (Synthetic replication):

Expense ratio: 0.08%
Service fees: 0.30% per annum
Total cost: 0.38% per year
Pros: No dividend withholding tax, potentially lower overall cost
Cons: Synthetic replication introduces counterparty risk

• Infinity US 500 Stock Index Fund (Wrapper):

Expense ratio: 0.335%
Pros: Adopts a well-established Vanguard fund
Cons: Highest expense ratio among the options