Secondly, what stores have the highest quality white shirts to be worn for interviews?
Most Helpful Guy
White shirt, lighter blue shirt, yellow shirt, pink shirt all work well with navy imo.
As far as ties you've got a lot of options. I like yellows, browns, silvers. Match with the shirt.
Only thing is in my opinion don't go straight blue tie or especially straight red tie, he'll look like a politician.
But overall I imagine you know what you think is hot, so go with that.