Most of the point mentioned by gate2vn are relevant, but a reseller quite can be a one-man band if a host selling reseller services offer support as well.
I think it's essential to try and evaluate host's services before you plunge into business with him thoroughly, that's why it may be worth trying those hosting providers' services who offer some trial period, in the case of HostWW.net it's the first month that you can get for free
http://www.hostww.net/inner.php