Hmm, I have tried several over the last few years, Hostgator seems to be the one that stands out, careful thought with mellowhost, I tried it out to see how it worked, it has a lot of options for reseller account unfortunately they have a lot of glitches and major problems (Lost of data,changes that render your sites inoperable due to compatibility as well as continuous downtime for users hostings), 9 out of 10 times support is fast, billing it's strange.