If you are coming from polos and jeans to wearing business casual every day, dont bother getting some famous or expensive brand like brooks brothers. Just go to whatever department store and find something that fits well, is cheap, and has a deal for like 5 or more. Then find a similar deal for slacks, and keep the colors of the pants grey, blue or black, and avoid tan/brown. If you are tallish, perry ellis might do from dillards or wherever. then get a brown and black (DRESS) belt, and 3-5 pairs of dress shoes (with ten pairs of the same black socks). spend no more than 50 USD per shirt, and 100 USD per slacks, and 200 USD per shoes. Its far more important that the clothes fit well (slim at the waist, not tight at the chest, no material in the back/legs, sleeves/pants are right length) the brand doesnt matter. Use that as the base of your everyday wardrobe. It will be cheap, you wont care if 1 or 2 gets ruined/stained/ripped whatever. After this, you can experiment by trying some new styles/brands. For example, if you have your heart set on brooks brothers, they have a nice wrinkle free line, but these will run 120-150 USD per shirt.