First off, welcome to Dakka, and welcome to the Sons of the Lion! I myself have a Dark Angels army, so I would be happy to tell you about what I do. As far as the recommended scheme, I tend to follow it exactly. One thing I do differently is to use Mephiston Red instead of Khorne Red for the gun casings and tactical arrows on the shoulder pads. To me, Khorne Red is a little too dark for this. Other than that the recommended scheme is pretty solid and looks great when done right. For basing, I swear by
GW's texture paints. They look great when shaded and drybrushed. I glue the figure onto the base and paint it, then I do the base. There is risk of messing up the paint job, but it is ok. If a little bit gets on the mini's legs, I can either fix it relatively easily or just say it is mud that splashed onto his legs.
I look forward to seeing your stuff once it's painted!