If you have to burn ethanol diluted fuel, then the W-1 574s, without question.

If you have access to real gasoline, then which ever one seems to be in the best overall condition; unless you, or your mechanic has a preference.

If you do the W-1, read the article on my website about cleaning the idle circuit, and expanding the idle jet tube top.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop