I have smoked my fair share of them. My pick would be the naturals. They are some tasty cigars. I would recommend you try to get a sampler of the different sizes. The flavor seems to vary greatly between them. One may suit your tastes while another will put you off.
I like the maduros, also, but it seems the quality on these have suffered recently. My favorite in these are the Bolidos and the Climax.