You will be very pleased with the PRLv2 lift! It is as good as it gets IMHO!
With regards to your phenolic table choice, Woodpeckers has a new line you might want to look at: Woodpeckers Router Table - 24 x 32 Phenolic
Woodpeckers a well as Incra and I'm sure others offer different packages for routing on both sides of the tablesaw. Now a few things to consider:
The incremental positioner on an Incra system, when mounted atop a tablesaw will limit the use of the tablesaw. During some applications, you may have to remove the system entirely to use the tablesaw. When I say "system" I'm referring to the LS positioner only". This will primarily depend on the "width" of cut your making on the tablesaw.
The LS positioner can be used on a dualwing setup. The only proviso is that you will have to "swing" the positioner around when moving from one side to the other. You won't be able to just pull the positioner out and reinstall into the backside of the base.
Originally on my tablesaw (prior to my making a dedicated router cabinet) I took advantage of the two mitre slots. I made a jig that locked down into the slots and then the base unit mounted to the jig. This worked great when routing on the left side of the table. In order to work off of the right side, all you would need to do is swing the LS and jig 180 degrees...just something to think about...
As for the wing extensions on a Jet saw, I'd just fire off a note to Jet and ask what they have available or recommend or call their customer service line if they have one.