I have a pair of 180 TNKs and I'm 5'11 180.  I like long skis.  While they might be a little on the short site, they are wider than the STLs.  They are a fun ski, and are stiff too, which is more beneficial for larger people.  I would say it would probobly be fine.  They measure a little short though, like 178 or something I think.