Thanks for the reply's.
I had heard that Inventor had changed its modeling kernel in V7. Same type of move they made with the AutoCad format years ago. I don't think the industry would follow this time but, . . .
I used Inventor V1 thru V4, then changed jobs. Now, I'm at a point to use this type of software again. The reason we used Inventor previously was because it was an "AutoDesk" product. I will be wanting to use my models on a website, which solidworks has the capability. I know it's hard...