I have a few choppers .. I wouldnt know what to recommend to you tho , not knowing what you are chopping and what would be regular use for it
I wold suggest tho , that you buy a couple cheaper larger knives , and go give them a work out .. itll at least give you an idea of what you really need . some people are happy to have a 8-9 inch blade as a chopper .. I prefer 12 or more myself .. there is in that few inches of steel , one hell of a lot of difference in what you can do with your knife and how well and efficiently you can do it
if you get a couple cheaper knives ( not a stupid cheap made in some unnamed country outa artificial immitation steel but just a machete or bigger knife for around the $20 -$50 mark ) and go have a whack with it , youll find out what is your own action , do you like to chop with a wrist snapping action , or throw your arm right back and chop like you mean to be choppin ... if you like to do the wrist thing , youll be never really happy with a longer blade ... but if you like to put your back into it .. a shorter blade can leave you feeling less than satisfied as well
It also lets you mess with what kind of grind you like ... something you probably wont want to do when you get your final knife ....
this is just my thoughts on it .. I have a few blades from valinatco , blades of java , and Im happy with them , I never really got into the chopping with a wrist action .. if I have a small blade that requires this , Ill get a batton and belt it thru instead
just my thoughts and opinions , hope they help