Does my ideal miniatures game exist?

I'm looking for a miniatures game with the following features:

* Small Scale (5-20 models per player ish) * Highly customizable models (in terms of mechanics, not necessarily the models themselves) * Matched play rather than campaign (one of the main things I'm looking for is having fun building lists) * Both melee and ranged combat. * Rules and armies available online (happy to pay but I don't want to need to get a box shipped to me).

What games like this are out there?