I've actually used the 3mm Fizik black perforated "leather-like" tape. Really liked it. Padded, but not overly so. Not too expensive. I think you'd do well to try it.
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A race bike in any era is a highly personal choice that at its "best" balances the requirements of fit, weight, handling, durability and cost tempered by the willingness to toss it and oneself down the pavement at considerable speed. ~Bandera