On a sunny day (21 Sep 2006 10:55:07 -0700) it happened "Telstar Electronics"
wrote in
om:

Their performance is predictable, repeatable, and would avoid
some iterations of PCB layout I think.

As Frank mentioned, think modular for a moment.
You would test this on a simple piece of single sided scrap board,
(well I presume you can etch your own?) just for the SWR part.
Once you have a SWR meter correctly working you can either
take the layout and paste it into the main board, OK first time,
or make some header pins and solder bridges and use it as sub-board,
'option'.
I would do the first.
Many things I designed are just a combination of little pre-tested parts.
[That way] You get a library of circuits over time that works, like stones to
build a house, or castle.