Need advice on choosing software for creating a website.

My current website WWW.jandmmfg.com  needs a total overhaul. It was designed with Expression Web 4.  I could use Expression Web 4 again to revamp it, but I am very familiar Visual Studio 2008 using Visual Basic, but not so much with the Website creation part of it. I am curious about ASP.Net for website creation. So I am hoping someone that is familiar with creating websites through Visual Studio 2008 might either give it thumbs up or down to help me decide. No right or wrong answer; any insight will help, including (stay with Expression Web 4) or other software not mentioned. Thank you.