Here are the 18Z models. Again, I removed the worthless BAMD/BAMM/BAMS/ETA/LBAR models and focus on the dynamic models. All the models you see taking Rita WSW toward the Yucatan and BoC are iterations of the NOGAPS model.
The most I'm willing to take from that is that Rita will shoot the Florida Straits, beating up Cuba a bit, but probably stay over water while moving into the Gulf.
The models are in good agreement about that. Wednesday evening or Thursday will probably the first time when we can make educated guesses as to landfall. It all depends on how strong the ridge to her north remains during the week.
It's going to remain strong through Tuesday without a doubt, which will keep Rita moving west or even slightly WSW during the period.