Sedraxis

I agree with Sordit, the wiki has great info. I recently started with Ramos myself (after massive doubts) and he's tons of fun, but that would've been de case with pretty much any master I'm sure. Everything is at least viable, so don't worry to much about picking the best box. It mostly comes down to how you play them. Instead, focus on the playstyle and looks of the models. I also recommend looking up some battle reports on youtube, maybe you'll see something you like. Both Colette and Ramos can be built and used in multiple ways, but to keep it simple for now I'd say the Ramos crew brings the beatdown and swarm. Colette brings trickery and control to the table from what I've seen. Can't go wrong with any of them. Good luck picking your first master!