Julie, the tilt head design been easier to access the bowl or add ingredients is a good concern if you compare with the 5qt bowl lift mixer which is a narrow bowl. The 6 qt has a wider bowl and I find it easy to scrape or add ingredients.
If u can afford the price and space, by all means the 6qt. Do not buy a used one or discontinued one that was produced the first couple years because they were extremely noisy! They are not as noisy now, but still noisier than the artisan!
Note that scraping isn’t necessary if you use the beater blade. I used it for all the rhc book!
I always use my artisan because it is quieter, if capacity isn’t an issue. All recipes on rhc, except the wedding cake chapter fit on the artisan. The artisan is powerful enough for the most violent meringues or hardy breads! Single batches only. The artisan also powers all my attachments, and I have all of them!
Do note that there is a 7 qt and it is extremely quiet! Quieter than the artisan!