joining the party late...here are my $.02
>>men's warehouse
Nice suits, but rather pricey. If you will only have one or two suits for a while, then def buy there because they are higher quality and will last. If you think you might need more than that than go to a bargain place like
K&G you can get two suits, shoes and a few shirts for the price of one suit at the warehouse....and really, all non tailored suits look the same to the untrained eye. If you can afford it, get a tailored suit...
>>ties
I agree with Jeremy that knowing how to tie one should be a requirement for graduation - when you learn it once, you will never forget it - sort of like riding a bike. I almost always do a full Windsor - I'm a big guy and a fuller knot looks better on me.
>>color
again, if you will only have one suit, get a black one - you can use it at almost every occasion. same with shirt, if one, get white. you can mix it up with different tie patterns/colors