Intel Mac :: Can't Open Safari After Migration

Moved files from old iMac (2006) to new iMac (bought yesterday) that was running itunes music off of an external hard drive. Move seemed successful, and I re-attached external hard drive but Itunes would not open, saying itunes was a "newer version" than what was on new iMac already. Did software update and it did not finish the update, saying try again. Second time, it completed update, updating itunes and then the new iMac was able to read the external hard drive fine. I tested a few songs and itunes found them and played them fine, all artwork ok, etc. 

So, then I tried to open Safari and it told me it could not run this version of Safari on the new iMac OSX. Tried the update software trick again, but it still will not open, same message. Under Safari preferences, it shows two default Safari versions, 5.0.4 i thinkg and 5.1.1 (i think) [I am at work now].  I can get around this and get to the internet fine by double clicking my Amazon MP3 icon, which asks if i want to quit and go to website to update, where i am then on amazon.com and have all my bookmarks etc listed on web browser just like before and it works fine...So how can i get icon or safari to open from dock or desktop? I have not tried to download new safari from apple website yet to see if that works to overwrite the others...Am i missing something simple? Can i just delete safari in applications and re-download it or should i run disk utility or ?