Steve,
I can't help on the Nikon or Canon as I am only familar with Pentax, but I would suggest looking at
https://www.adorama.com/
https://www.bhphotovideo.com/
box stores can be iffy with camera gear.
Lens that come with Cameras as a kit are often intro level lens added as fillers to make the deal look good. They are good beginner lens but they often are just "ok" Sometimes its better to buy the body separate and buy the lens separate..
I'm sure the others will chime in with more helpful info,
al