Samhain44,
If you're choosing between these three, I don't think you can go wrong.
I haven't been to either TR or GS, but have looked into them and would probably go to TR if I were to take one of these classes. From what I've read TR is state of the art for both their facilites and instrutruction.
My impression of GS is that they are a bit more dogmatic in their approach. I tend to disagree that there is "one true way" for self-defense and feel the more skills I have in my bag of tricks, the better off I am. I wouldn't hesitiate to take a class with them though. I'd just rather train at TR first.
I know a fellow that is a part time instructor at Blackwater, and if he is any indication of the quality of their staff, you will defintely get you monies worth. I haven't seen the facility but have heard it is pretty impressive. If I were limited in my budget, I think BW would be a good choice.
At any of these facilites you're probably going to be presented with more than you can absorb, but will no doubt come away a better shooter.
I have taken LFI 1 with Mas Ayoob. Level 1 incorporates some dynamic shooting skills and requires a qualification that is as stringent as most PD's. That said, it is not a shooting course like TR or GS. What it does best is prepare you to have to correct mindset to survive, and the knowledge to help manage the aftermath of a self defense shooting. It provides an excellent foundation for addtional shooting skills courses, and unlike some other self defense instructors, Mas will encourage you to seek training with other knowledgeable instructors.
HTH