If you are in South Florida, as your information suggests, you are probably better off hooking up with a GUE instructor, because there isn't much UTD in Florida.
Despite what AJ writes, UTD is not to be rejected out of hand. We have, in Seattle, two active UTD instructors and a GUE instructor, and all three have produced a number of students over the last few years. We dive together. Things work. We do not have the sidemount and rebreather stuff happening here, which helps; UTD-trained OW divers and GUE-trained OW divers are completely compatible, and the standards, at least here, are quite similar. I am GUE Fundamentals and Cave 1; 5thD-X Rec 2 and 3 (precursor to UTD) and UTD Tech 1, so I'm one of the few divers you can talk to who has trained with both agencies. I have personal opinions about both, but the bottom line is that either will lead you to a standardized system among skilled divers, and that's a good thing.
If you are aiming at serious technical or cave diving, you probably need to choose a camp. As the dives you contemplate get higher and higher risk, your potential companions are going to get more and more picky about what they want to do. There are sufficiently divergent protocols between the two agencies to make some divers really uncomfortable. AJ has pointed out one of them.
If you want to talk about this more in private, please feel free to PM me, and I'll feel free to make my opinions known