I've only been through about half the posts in the thread so far, but it occurred to me that Forten Sweet is rather soft string as syn. guts go. You might get enough of the softness from something else in the family - maybe Prince Original SG (not the version with Duraflex), Tecnifibre, etc. - but you might also consider a heavier gauge of multifiber. Prince Premier Control comes in 15L and it definitely holds up better than the 16 ga. version. I also like this multi because it doesn't seem to steadily soften and degrade as it's used compared with some others.
If you like the heft and stability of the RF97A, you may want to consider a try with a Volkl C10 if you get the chance. This Volkl can certainly work as a more flexible alternative to the somewhat stiff Wilson.
I've played with both PPC (16) and Forten Sweet 16 quite a bit and they're very similar in durability but I like the feel and playability of the Forten better. Haven't tried the PPC 15 gauge.
I demo'd the Volkl C10 and didn't like it. Had a lot of plowthrough and was very stable, but also felt very heavy and unwieldy to me compared to the RF97A.