This is mainly so you have to do the least amout of file converting.  Secondly, most of the top name software (i.e., Solidwork, Autodesk, Pro-E, etc.) current versions will be able to convert most if not all of the files you deal with.  So file conversion these days is not as much of an issue as it used to be.

 

So ask the companies you deal with and find out what most of them are using and purchase that one, it will save you some headaches in the long run.  But just remember that if the change in software is to radical there will be a learning curve to deal with as well.

You will have to do some research on Unigraphics to find out what it can/can't do.

 

 

Does your best company make up over 50%+ of the work you do?  If not then I would say keep looking. 

 

One other thing to keep in mind is......Does any of the other software you are considering convert Unigraphics files?

 

I wouldn't make any quick decisions (if you can avoid it) on what software to buy.  Puting some serious thought into what best works for your company overall will benifit you greatly.