If "chopper" is really part of your criteria then the ESEE5 and BK2 are the only two knives in your list that can meet that description. Both of those are great but I'd personally go with the BK2. Micarta is better looking to be sure but I like the way grivory functions and feels much better. The steel is about the same in both as is the heat treat. The warranty is functionally the same. IMO, the sheath is the only thing consistently better on the ESEE knives. Having said that, the BK2 sheath is my favorite of all of the Becker knives I own.
Is the somewhat better sheath worth nearly twice the cost? Not to me. IMO, the Becker is the better value.
As to those that say the BK2 (or ESEE5) is too thick and heavy - pish posh. Try one - they are very nimble. Here - have a look at this...
It whittles tiny spoons and forks and things...
It chops seasoned oak for no good reason...
It cleans fish...
It batons...
It poses majestically...
It survives nuclear blasts...
What's not to love?
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Beckerhead #42