If you are a hobby baker how often do you double a recipe? I can double a cake recipe or brownies in my 6 quart. I have my mom's KA and a 6 qt profession KA.
Ask yourself will you be selling stuff or do you just do it because you love it. That's a lot of money difference and it doesn't grow on trees. As much as I might want a 7 qt. I don't think the difference between 6-7 warrents spending the money. I don't sell nor intend to sell from home. I do work at a bakery where I can use the big machines but I end up using my own 6qt there often. Give it some serious thought. I also really want a reversible sheeter to do fondant but that ain't gonna happen so I can just keep rolling out fondant on the table. Like others I have a lot invested in my toys /tools but I realize some things ( like cricut) were a real waste of money.
I think a lot depends on your financial situation....
good luck on your choice