My Mom has the 3160, and hasn't had a problem with the presser foot height. She's put a lot of miles on that machine, and still loves it. It's light, quiet, and a real workhorse. She's not the gentlest with her machines, but the 3160 can stand up to anything.
She has a Janome Horizon 15000 as well, but the 3160 gets more use. I highly recommend it.