Which one would you suggest me?
I heard bluehost is the best hosting service but hostgator is good too and is cheaper.
All I want is a fast webhosting service with unlimited storage/domains/subdomains/emails. If they met those requirements, I prefer to chose the cheapest one.

Any suggestions?  

Bluehost and Hostgator are both part of EIG and are quite terrible.

http://en.wikipedia.org/wiki/Enduran...national_Group

I would recommend keeping your hosting and email separate and going with at least Google Apps for Business or Microsoft Hosted Exchange. $4-5/mailbox/mo and you can add as many aliases and domains to it as you like.

If I was going to recommend shared hosting I would likely go with Nixihost or Veerotech.  

Is Nixihost giving free domain forever if we buy the professional package?  

Posted by Hugop

Is Nixihost giving free domain forever if we buy the professional package?

It's likely renewed every year as long as you have a subscription with them. I also recommend getting your domain from a registrar (Namecheap, Gandi, etc.) rather than through the web host.