If you feel as though you will want to use quick-attach implements such as pallet forks, different buckets and other loader attachments, you will want to go with a model other than the KL451. If you're not that interested in quick-attach, the 451 may be a better choice.
I believe that most quick-attach implements cost a little more than standard, paying for the convenience.
As you may know, there are other types of forks, such as bolt into the bucket types, but they are probably inferior to quick-attach types.
These are the loaders that Kioti offeres with quick-attach plates:
KL1450, KL1470, KL1590, KL1595, KL1730.
As for the hoe, either the KB2375 or KB2385 may be used, but I would go with the 85 for that size tractor. You may as well get all the hoe the tractor can handle. I'm not sure if Woods has a mount for the DK45S yet, but if they do, check it out before you decide.
John