That will be great to find out about the new RS1e's. Hopefully kvtaco17 is engaged with his do diligence this weekend and the mystery will be revealed. I'm getting up there in birthdays and I prefer a really tight bass line with not a too much punch or overbearing presence because I find it distracts from the subtleties in the music. Just me though.
True, the PS500 has a very "in your face" bass, nevertheless good sound distribution. But yesterday I found myself having to switch from PS500 to GS1000 when listening to Jose Gonzalez' Veneer album. It simply gave the music significantly way more justice allowing more sounds to break through.