I recommend the Janome HD9 V2. It is a little better than the comparable Juki. It goes over lumps, bumps and sews through more layers. Both are good machines.
Hd9 v2 Straight stitch only, can use industrial feet found at Wawak. The bobbin is about one and a half times larger than regular domestic machines, .This is the upgrade to the Janome 1600. I purchased this machine to sew denim, purses, totes, boat covers and leather.