I'm going to jump in here and advise that men buy one really nice suit instead of two cheap ones if it is at all possible budget-wise. My husband has both and the difference a more expensive suit makes is actually quite noticeable. He spent about $450 on his new suit (major sale - it is an $800 suit) and it looks fantastic on him. The $200 suit just isn't as nice, the fabric doesn't look as good and the more expensive one just hangs better. Men are lucky and can get away with one nice suit and different shirts and ties. Women really do probably need 2-3 different suits.
For anyone looking to save some money, Nordstrom usually has a big sale in the end of July (it starts 7/20 this year) and you can get some good deals. I will probably be picking up a few more suits for myself at this sale for OCI, and shirts and ties for my husband. Nordstrom is more expensive than a lot of other places, but the service is good and at least for men, I think the suit alterations are free.
Macy's is also a good option, and a bit less expensive, and if you get their store credit card, you can often save 20%. For a major purchase that might be well worth it. Also surprisingly, Costco occasionally has dress shirts that are nice and fairly inexpensive.