If you are picking it up... Go with the #4... As some of your costs will be deferred.
If you think about it... If you get the 4 you won't need a cart and that saves you about 200... And picking it up saves you about 200... Less gas and opportunity cost... You are really just talking 300 difference.
That's how I rationalized getting the 3 with stand because I met Steve near his house and picked it up eliminating any shipping charges.
Make sure someone is at home to help you unload that monster. 😉