Thanks a lot TheLastSuperman! I tried gconverter.com , they completely converted my xenForo 1.0.0 to vBulletin, one thing is that my new vb user's passwords are new now (randomly generated), and they installed new plugin in my forum's back-end, which allows me to send "New password" notification to my users email addresses.

Actually the owner of URLJet sent me that link so credit to him, I simply remembered it and did a quick search on Google then pasted the link :p.

Very handy, and reasonably priced too. When I used Impex all my users had to apply for a new password - very inconvenient.

Might I ask what were the main causes for your shifting to vbulletin.

Yes, the main reasons are lots of plugins, styles, + vb CMS and Blog features.

What I'd be curious to know is why they have a converter for xenForo already since it is fairly new.

I understand. Best of luck with your new setup.

I understand. There are still a few more plugins/add-ons that I need before transitioning over to xenForo for some of my sites.

But, they already have quite a few styles and an option (or two) for CMS (I'm using one on TeeVeeTown.com) as well as a great option for a blog. So, you may have not looked around enough yet.

Thanks for good information.
There were many reasons, I can't say all, that was just great complex of all, an addition I can say that my friends have vb too and they help me for any issues, some of them vb plugin and style developers, thus I have no any problem with vBulletin now.