I personally would be very surprised to see Rita regain CAT4 status. She's been fighting what looks like a losing battle with dry air to the N and W, along with lower heat content waters. The CDO is lopsided, with occasional flares of convection on the west side. Bands of dry air keep manifesting themselves on the north side, and each one results in a significant erosion of the CDO on that side...just look at some longer-range WV loops like those on UCAR and you'll see what I mean.
Plus, she keeps meandering to the right of the NHC track, even with the number of wobbles she's gone through. I have a gut feeling she'll plant herself in the vast swamplands of extreme SW LA, maybe slightly east of Port Arthur. For now my landfall guesstimate is about on top of Port Arthur, around 5am local time, 110kts or less.