Open Question: Should I set up my corporation before or after going to the bank for financing?

My wife and I are purchasing an exisitng business. We will be running the business as an S-Corporation based in our home state of Texas. We haven't set up the S-Corp yet, but have everything ready. We are planning to meet with some banks next week with regard to financing our purchase and it just occured to me that perhaps we should set up our corporation first and THEN go to the banks for financing. Because, in reality, the bank is going to be lending the money to our corporation, not to us. However, is there really a problem in going to the bank before having our corporation set up? Thanks in advance.