I'd do the Janome, hands down. I sew on vintage Vikings from the '60s-'70s. They are probably the best machines going, but you couldn't pay me enough to buy a newer Viking. I have a Janome that's roughly three years old, and even though I don't use it every day, it 's been very good with no troubles. I just have it set for specific tasks so I no longer use it for piecing or garments.
Back in 2007 or '08 (or thereabouts) Husqvarna/Viking sold the sewing machine division to a conglomerate called SVP Worldwide. "SVP" stands for Singer-Viking-Pfaff. Yep, SVP bought these three, and it appears quality has suffered after the acquisitions. They are no longer made in the original country of origin, and I've heard of dealers who have dropped the line.