Chiu Lin> Have your HTB chose his colour of the suits that he will be wearing for photoshoot.. Basically you can just get the common colour, white, black and red. Cos he wear inside cant see much, only see collar at most.. My hubby got from BHB, if not u can try G2000, they cater to mass, so design wise is modern.
Of cos it also depend what colour of gown you are wearing.. Unless he is going to often wear the shirt that he tailored, then dont bother spending the extra buck to tailor.