I haven't bought a suit in several years but I've bought a few dozen over the years. Most have been at Dillards but now Men's Wearhouse isn't a bad place to go. If you know what you're doing, a Dillards outlet MAY be a good place, but just look for those on sale at the regular stores for now.
Stick with the known name brands -- I like Hart Shaffner and Marx. But clothing brands aren't what they used to be as name brands get bought and sold. HSM and Hickey Freemen are (were) two of the higher end brands that are high priced but on sale are reasonable. There may be other good brands but stay away from something like Roundtree and York.
I think flat front pants are still the fashion "in" right now but suits are somewhat timeless. Pleats on suits are fine -- at least I think so. Perhaps the younger crowd doesn't agree but remember that he usually won't be interviewing with someone his age. I'd suggest a 2 button traditional suit and for all that's good, please do not buy an overly fitted suit for a first/job interview suit. Stick with dark navy or preferably dark gray. Get a couple of nice, conservative ties and some WHITE shirts. Yes, boring, I know, but never go into an interview in anything but a white or pale blue shirt. Preferably white. Plain collar (rather than button down) is better.
Don't forget good quality shoes. The leather sole Allen Edmonds are top of the line but honestly, I stick with Eccos and their composite sole. More comfortable and about as good looking.
