I have the 9.5xp and I've run with a number of guys who have the 9.5ti and xd9000's.
The xd9000 is a last generation winch from Warn. Still good, still strong, still pulls hard but last generation.
The 9.5xp and 9.5ti are the latest generation winch, among the improvements, the biggies are: stronger next-generation 6hp motor, better sealing all over, and a better chip-resistant finish.
That being said, the 9.5xp I believe has a longer or constant duty cycle and remot-mountable control pack where as the 9.5ti is significantly faster (on no-load line speed: 62 fpm vs 38 fpm of the xp) and it has a winch temp feedback indicator to let you know if the winch is getting warm. Plus the control pack is in a sealed integrated housing.
As for restricting airflow. . . I haven't heard of this being a problem for the Jeeps. No one I know has complained about it on the highway and on the trail the Jeeps are going so slow that it doesn't matter.
Were I doing things again I'd probably go with the 9.5ti.