HostDiscovery for me, I was looking at HostGator, but their reseller pricing and plans were stupid.
I like to have a seperate cpanel and space for each domain I own. My only problem is the space and bandwidth limitations, which are fair though and are not an issue for me right now anyway
I was with Host Every, and let me tell you, for space, and bandwidth you could not beat the price, something like $15 for 1000gb of space and 5000gb/month.
The problem came into play when I found they didn't allow/use PHPExec(), nor did they have any suitable replacement for it (PHPSuExec()?)
I would love to find any other comparible reseller hosting with more space/band than host discovery has for the same price or cheaper.