I want to deal with the company that controls my fate in the event of a legal issue, domain theft... or if we lose this battle, responding to SOPA actions. A reseller is a bit powerless to help you with those things.
Now add SOPA to the mix for a site that hosts user content (like blog comments). If anyone files a right of action against you, the registrar pulls your domain, and you have 5 days to file a counternotice to get it back. If you're buying from a reseller like this, how many of those 5 days are wasted between the time they're notified by the registrar they resell and them notifying you? You really don't have the time to spare -- you need to get that notice, retain counsel, write and send the counternotice, and get it to the registrar (who you may not be able to directly contact by buying through the reseller) before time's up.
By the way, Hover.com is basically TUCOWS, which makes them one of the biggest registrars.