Re: Which city should a chose for musicians?
Dallas/Fort Worth has lots of Christian metalcore and post hardcore bands. LOTS. Lots of churches too where I'm sure you could find like-minded individuals who play instruments.
Its kind of over saturated to be honest. Lots of DWP/Underoath clones. Not my cup of tea but this area is definitely a good place to do that. Plenty of venues that cater to that style.