hi
want to buy business class from arvixe.com is this site reliable?

You can search for their reviews here at WHT http://www.webhostingtalk.com/search.php and see if there are any customer reviews available.

I would recommend to stick to the well known names so you will be sure not to be disappointed.

I think they are pretty big as shown in www.webhosting.info

Do the search for their domain name. Here + wehostingstuuf + google.
I suppose that would be more then enough. I hope you will be able to find something there soon

Check the reviews here, there should be a few at least. Let me put this question to you if you don't mind, though. Do you really need the unlimited space and bandwidth? There is some good information here about how that works, and it's something worth checking into if you're using this for business purposes.