Well, It really depends on the budget you have,

hostgator.com and bluhost.com are excellent. For reseller, I would recommend you WHM/cPanel host. It may not be easy to find out a host with at least 2 years in business, but I found many in Google. Also, a last and most valuable suggestion - DOnt go to eBay to buy hosting(as most of the users sell unlimited everything, which isnt physically possible, at least in this world). Never ever buy hosting with Unlimited everything. We live in real world where everything is limited, not unlimited. How many Hard Drives will you add to a single server, say?