Merc Optimax 150 431lbs (per their website)
Suzuki DF 140 4stroke 410lbs (per their website)
Given the choice between 4 stroke and 2 stroke prop motor, I'd take the 4 stroke.
You could do away with the kicker unless you like it for get-home reasons.
I didn't check but I bet the Suzuki is a fair bit cheaper.
I'm just a 4 str fan and have good experience with Suzuki 4 str.
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If you leave things up to interpretation, there's no room to be right.