Touring bikes make fantastic commuters! Of course, a Trek Fx series works just fine, too, as it will have mount points and room for fenders, etc.

It will depend on your preference. I mostly commute on a touring bike (Specialized AWOL) and when my wife rides to work it’s on an older Trek FX 2.

If budget is a concern, I agree with the above advice to look for an older touring bike. They make great commuters!