I love these threads, brings out all the EFT warriors.
Anyways to answer your question there really is no best thing for anything in EVE, the question itself is flawed.
You need to know what is the best ship+fit for what you are trying to accomplish, there are ships that are more versatile (arby and most minnie ships) but there will never be a ship that is the best for any one thing, however there is a caveat... there are ships that are basically useless, ie augoror et al.
It's all about the fitting, if you can't fit an arby properly it will suck at everything. I pvp'd with it in lowsec on another toon for six months, had a ton of fun. Neuts and td's baby, but stay the hell away from missile ships, you'll die.