My suggestion is to stay with Ilford films if you can.
Over the (many) years I've used these, I've never, ever had any processing problems. FP4 and HP5 are very forgiving. The Deltas may be a bit more, well, 'problematic' - friends who use these say they can give fiddly results in developing. I've not used them, so this will be for somebody else to comment on.
The TMaxes originally came with a steep learning curve (this was in the late '80s) and I disliked the results. The newer versions apparently removed most of the problems. I went back to Ilford in 1990 and I've never looked back.
I used Shanghai films for a while in the early '00s as there was a bit of a supply problem with Ilford then. Had good results from these, which most of my friends who did the same thought was rather odd. Nobody liked them. I also tried Foma in 2008 or 2009, but my results were meh! so I went back to Ilford.
As always, a lot of good advice in this thread. Amazing what one can learn even after half a century of loading films in tanks...