Gary, with the springs removed a plunge router works super under a table. This is the prefered method of Bob and Rick from the Router Workshop. Today many brands are sold as combo kits with both the fixed and plunge base. This is why you hear so often about mounting the fixed base in the table, so the plunge base is available for free hand use. There is no need to be concerned about which table you use to mount your router. You will have to drill holes in the mounting plate for most of them. This is easy to do and described elsewhere on the forums.
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"