Non-compete still valid after all these factors?

I am being actively pursued for an outside sales position by a direct competitor of the company I now work for. I am currently an Inside Sales/Customer Service person and would be calling on many of the same customers I now deal with as a customer service person.
I reside and work in MI, but current company HQ in OH, while owners office is on IL. Current company was bought about a year ago and the contract states that the State of Indiana will govern all validity and such as IN is where previous owners office was located. The contract does say that it can be assigned to any business entity that acquires all or substantially all of the assets of the company. Also, the contract was signed in 2004 while I lived in WI and became a Manager. I am no longer a manager in current company. I have a few questions:
--How long do non-competes last? I signed in 2004; is it still valid? It states a 24 month restriction.
--If I decide to take my chances and accept new position and my current decides to sue, what state would govern the trial? If I have read correctly on this site, both IN & IL do not allow assigning contracts to new owners as they consider all non-competes as "personal services contracts". Is this true?
--Also, with me no longer in a manager position and actually in a "lesser" position, is the contract still valid?