I'm 23 and I need a suit for job interviews for engineering jobs. I am 6'2" and 140lbs. Not sure if that matters. I know nothing about suits. I want something classic, not trendy. I do know I want flat front pants. Should I get a 2 or 3 button? Solid, stripe, ministripe? Black, charcoal, or blue? How much should I be looking to spend? Is MensWarehouse or S&K okay, or should I try Macys?