You can never go wrong with any of the Ashford wheels. They have been around forever and parts are always available for them. They are sturdy wheels and hold up forever.
For fat, art yarns, yes you will want the Jumbo flyer & bobbin. You'll have smoother action if you get a sliding hook flyer instead of a flyer with hooks.
With the Traditional, you can spin both bulky & fine yarns.
If you think you want to spin only bulky art yarns, you might want to consider the Ashford Country
My first wheel was an Ashford Traveller. I liked that it had both the double drive and scotch tension so I could decide which what I wanted to tension my wheel. I love the smaller footprint and the ease of carrying it around.